21562620013 has 8 divisors (see below), whose sum is σ = 23528023776. Its totient is φ = 19598077200.

The previous prime is 21562620007. The next prime is 21562620017. The reversal of 21562620013 is 31002626512.

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

It is a cyclic number.

It is not a de Polignac number, because 21562620013 - 2¹³ = 21562611821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21562620017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162298 + ... + 263563.

It is an arithmetic number, because the mean of its divisors is an integer number (2941002972).

Almost surely, 2^21562620013 is an apocalyptic number.

It is an amenable number.

21562620013 is a deficient number, since it is larger than the sum of its proper divisors (1965403763).

21562620013 is a wasteful number, since it uses less digits than its factorization.

21562620013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430475.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 21562620013 in words is "twenty-one billion, five hundred sixty-two million, six hundred twenty thousand, thirteen".