20498412870 has 96 divisors (see below), whose sum is σ = 57460384800. Its totient is φ = 5040064512.

The previous prime is 20498412863. The next prime is 20498412877. The reversal of 20498412870 is 7821489402.

It is an interprime number because it is at equal distance from previous prime (20498412863) and next prime (20498412877).

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20498412877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1077501 + ... + 1096359.

It is an arithmetic number, because the mean of its divisors is an integer number (598545675).

Almost surely, 2^20498412870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20498412870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28730192400).

20498412870 is an abundant number, since it is smaller than the sum of its proper divisors (36961971930).

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

20498412870 is a wasteful number, since it uses less digits than its factorization.

20498412870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19814 (or 19811 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 20498412870 in words is "twenty billion, four hundred ninety-eight million, four hundred twelve thousand, eight hundred seventy".