21413608007356 has 24 divisors (see below), whose sum is σ = 38391890413184. Its totient is φ = 10445101556400.

The previous prime is 21413608007299. The next prime is 21413608007413. The reversal of 21413608007356 is 65370080631412.

It is an interprime number because it is at equal distance from previous prime (21413608007299) and next prime (21413608007413).

It is a super-2 number, since 2×21413608007356² (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 7 ways as a sum of consecutive naturals, for example, 75494970 + ... + 75778081.

Almost surely, 2^{21413608007356} is an apocalyptic number.

It is an amenable number.

21413608007356 is a deficient number, since it is larger than the sum of its proper divisors (16978282405828).

21413608007356 is a wasteful number, since it uses less digits than its factorization.

21413608007356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151273921 (or 151273919 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

Adding to 21413608007356 its reverse (65370080631412), we get a palindrome (86783688638768).

The spelling of 21413608007356 in words is "twenty-one trillion, four hundred thirteen billion, six hundred eight million, seven thousand, three hundred fifty-six".