21620614016316 has 48 divisors (see below), whose sum is σ = 57779495588864. Its totient is φ = 6163976339136.

The previous prime is 21620614016297. The next prime is 21620614016317. The reversal of 21620614016316 is 61361041602612.

It is a super-3 number, since 3×21620614016316³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21620614016317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277918195 + ... + 277995978.

Almost surely, 2^{21620614016316} is an apocalyptic number.

It is an amenable number.

21620614016316 is an abundant number, since it is smaller than the sum of its proper divisors (36158881572548).

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

21620614016316 is a wasteful number, since it uses less digits than its factorization.

21620614016316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555914650 (or 555914648 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

Adding to 21620614016316 its reverse (61361041602612), we get a palindrome (82981655618928).

The spelling of 21620614016316 in words is "twenty-one trillion, six hundred twenty billion, six hundred fourteen million, sixteen thousand, three hundred sixteen".