2621020431623 has 16 divisors (see below), whose sum is σ = 2913332800896. Its totient is φ = 2337717102240.

The previous prime is 2621020431593. The next prime is 2621020431629. The reversal of 2621020431623 is 3261340201262.

It is a cyclic number.

It is not a de Polignac number, because 2621020431623 - 2¹⁴ = 2621020415239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2621020431623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621020431629) 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, 31642940 + ... + 31725662.

It is an arithmetic number, because the mean of its divisors is an integer number (182083300056).

Almost surely, 2^{2621020431623} is an apocalyptic number.

2621020431623 is a deficient number, since it is larger than the sum of its proper divisors (292312369273).

2621020431623 is a wasteful number, since it uses less digits than its factorization.

2621020431623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137134.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 2621020431623 its reverse (3261340201262), we get a palindrome (5882360632885).

The spelling of 2621020431623 in words is "two trillion, six hundred twenty-one billion, twenty million, four hundred thirty-one thousand, six hundred twenty-three".