21290560098 has 16 divisors (see below), whose sum is σ = 44432473536. Its totient is φ = 6788294480.

The previous prime is 21290560087. The next prime is 21290560099. The reversal of 21290560098 is 89006509212.

It is not an unprimeable number, because it can be changed into a prime (21290560099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77139573 + ... + 77139848.

It is an arithmetic number, because the mean of its divisors is an integer number (2777029596).

Almost surely, 2^21290560098 is an apocalyptic number.

21290560098 is an abundant number, since it is smaller than the sum of its proper divisors (23141913438).

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

21290560098 is a wasteful number, since it uses less digits than its factorization.

21290560098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154279449.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 21290560098 in words is "twenty-one billion, two hundred ninety million, five hundred sixty thousand, ninety-eight".