21061550524998 has 16 divisors (see below), whose sum is σ = 42123146794560. Its totient is φ = 7020509217576.

The previous prime is 21061550524951. The next prime is 21061550525021. The reversal of 21061550524998 is 89942505516012.

It is a congruent number.

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, 8206593 + ... + 10462851.

It is an arithmetic number, because the mean of its divisors is an integer number (2632696674660).

Almost surely, 2^{21061550524998} is an apocalyptic number.

21061550524998 is an abundant number, since it is smaller than the sum of its proper divisors (21061596269562).

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

21061550524998 is a wasteful number, since it uses less digits than its factorization.

21061550524998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812051.

The product of its (nonzero) digits is 7776000, while the sum is 57.

The spelling of 21061550524998 in words is "twenty-one trillion, sixty-one billion, five hundred fifty million, five hundred twenty-four thousand, nine hundred ninety-eight".