21053613490396 has 18 divisors (see below), whose sum is σ = 37355447392872. Its totient is φ = 10382603902560.

The previous prime is 21053613490379. The next prime is 21053613490493. The reversal of 21053613490396 is 69309431635012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 493824000 + ... + 493866631.

Almost surely, 2^{21053613490396} is an apocalyptic number.

It is an amenable number.

21053613490396 is a deficient number, since it is larger than the sum of its proper divisors (16301833902476).

21053613490396 is an equidigital number, since it uses as much as digits as its factorization.

21053613490396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987690781 (or 987690706 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 52.

The spelling of 21053613490396 in words is "twenty-one trillion, fifty-three billion, six hundred thirteen million, four hundred ninety thousand, three hundred ninety-six".