21053652124646 has 8 divisors (see below), whose sum is σ = 31580502220704. Its totient is φ = 10526818051080.

The previous prime is 21053652124627. The next prime is 21053652124669. The reversal of 21053652124646 is 64642125635012.

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

It is a super-2 number, since 2×21053652124646² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21053652124646.

It is a congruent number.

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, 135731 + ... + 6490433.

It is an arithmetic number, because the mean of its divisors is an integer number (3947562777588).

Almost surely, 2^{21053652124646} is an apocalyptic number.

21053652124646 is a deficient number, since it is larger than the sum of its proper divisors (10526850096058).

21053652124646 is a wasteful number, since it uses less digits than its factorization.

21053652124646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8011246.

The product of its (nonzero) digits is 2073600, while the sum is 47.

Adding to 21053652124646 its reverse (64642125635012), we get a palindrome (85695777759658).

The spelling of 21053652124646 in words is "twenty-one trillion, fifty-three billion, six hundred fifty-two million, one hundred twenty-four thousand, six hundred forty-six".