20881902498 has 32 divisors (see below), whose sum is σ = 43334472192. Its totient is φ = 6701184000.

The previous prime is 20881902497. The next prime is 20881902541. The reversal of 20881902498 is 89420918802.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20881902498.

It is not an unprimeable number, because it can be changed into a prime (20881902497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254953 + ... + 326748.

It is an arithmetic number, because the mean of its divisors is an integer number (1354202256).

Almost surely, 2^20881902498 is an apocalyptic number.

20881902498 is an abundant number, since it is smaller than the sum of its proper divisors (22452569694).

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

20881902498 is a wasteful number, since it uses less digits than its factorization.

20881902498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581930.

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 20881902498 in words is "twenty billion, eight hundred eighty-one million, nine hundred two thousand, four hundred ninety-eight".