21354551300636 has 48 divisors (see below), whose sum is σ = 39606447605760. Its totient is φ = 10039624707840.

The previous prime is 21354551300617. The next prime is 21354551300659. The reversal of 21354551300636 is 63600315545312.

It is a super-2 number, since 2×21354551300636² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392382635 + ... + 392437053.

It is an arithmetic number, because the mean of its divisors is an integer number (825134325120).

Almost surely, 2^{21354551300636} is an apocalyptic number.

It is an amenable number.

21354551300636 is a deficient number, since it is larger than the sum of its proper divisors (18251896305124).

21354551300636 is a wasteful number, since it uses less digits than its factorization.

21354551300636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59834 (or 59832 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 44.

Adding to 21354551300636 its reverse (63600315545312), we get a palindrome (84954866845948).

The spelling of 21354551300636 in words is "twenty-one trillion, three hundred fifty-four billion, five hundred fifty-one million, three hundred thousand, six hundred thirty-six".