13623020621 has 12 divisors (see below), whose sum is σ = 16047789120. Its totient is φ = 11529063000.

The previous prime is 13623020603. The next prime is 13623020623. The reversal of 13623020621 is 12602032631.

It is not a de Polignac number, because 13623020621 - 2⁶ = 13623020557 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 (13623020623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1755755 + ... + 1763496.

It is an arithmetic number, because the mean of its divisors is an integer number (1337315760).

Almost surely, 2^13623020621 is an apocalyptic number.

It is an amenable number.

13623020621 is a deficient number, since it is larger than the sum of its proper divisors (2424768499).

13623020621 is an equidigital number, since it uses as much as digits as its factorization.

13623020621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3519344 (or 3519337 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 13623020621 in words is "thirteen billion, six hundred twenty-three million, twenty thousand, six hundred twenty-one".