21103398546 has 16 divisors (see below), whose sum is σ = 42209660064. Its totient is φ = 7033989024.

The previous prime is 21103398527. The next prime is 21103398581. The reversal of 21103398546 is 64589330112.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21103398498 and 21103398507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16675 + ... + 206118.

It is an arithmetic number, because the mean of its divisors is an integer number (2638103754).

Almost surely, 2^21103398546 is an apocalyptic number.

21103398546 is an abundant number, since it is smaller than the sum of its proper divisors (21106261518).

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

21103398546 is a wasteful number, since it uses less digits than its factorization.

21103398546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238585.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 21103398546 in words is "twenty-one billion, one hundred three million, three hundred ninety-eight thousand, five hundred forty-six".