19796752090 has 8 divisors (see below), whose sum is σ = 35634153780. Its totient is φ = 7918700832.

The previous prime is 19796752057. The next prime is 19796752097. The reversal of 19796752090 is 9025769791.

It can be written as a sum of positive squares in 2 ways, for example, as 17972351721 + 1824400369 = 134061^2 + 42713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19796752090² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19796752097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989837595 + ... + 989837614.

Almost surely, 2^19796752090 is an apocalyptic number.

19796752090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19796752090 is a deficient number, since it is larger than the sum of its proper divisors (15837401690).

19796752090 is a wasteful number, since it uses less digits than its factorization.

19796752090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979675216.

The product of its (nonzero) digits is 2143260, while the sum is 55.

The spelling of 19796752090 in words is "nineteen billion, seven hundred ninety-six million, seven hundred fifty-two thousand, ninety".