20902249898 has 8 divisors (see below), whose sum is σ = 31884788160. Its totient is φ = 10273987180.

The previous prime is 20902249877. The next prime is 20902249913. The reversal of 20902249898 is 89894220902.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88568738 + ... + 88568973.

It is an arithmetic number, because the mean of its divisors is an integer number (3985598520).

Almost surely, 2^20902249898 is an apocalyptic number.

20902249898 is a deficient number, since it is larger than the sum of its proper divisors (10982538262).

20902249898 is a wasteful number, since it uses less digits than its factorization.

20902249898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177137772.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 20902249898 in words is "twenty billion, nine hundred two million, two hundred forty-nine thousand, eight hundred ninety-eight".