19836210690 has 80 divisors (see below), whose sum is σ = 53464977720. Its totient is φ = 5277000960.

The previous prime is 19836210677. The next prime is 19836210703. The reversal of 19836210690 is 9601263891.

It is a happy number.

19836210690 is a `hidden beast` number, since 19 + 8 + 3 + 621 + 0 + 6 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (19836210677) and next prime (19836210703).

It can be written as a sum of positive squares in 4 ways, for example, as 7161729129 + 12674481561 = 84627^2 + 112581^2 .

It is a super-2 number, since 2×19836210690² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 311926 + ... + 370094.

Almost surely, 2^19836210690 is an apocalyptic number.

19836210690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19836210690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26732488860).

19836210690 is an abundant number, since it is smaller than the sum of its proper divisors (33628767030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19836210690 is a wasteful number, since it uses less digits than its factorization.

19836210690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58609 (or 58600 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 19836210690 in words is "nineteen billion, eight hundred thirty-six million, two hundred ten thousand, six hundred ninety".