21620310522003 has 6 divisors (see below), whose sum is σ = 31229337420684. Its totient is φ = 14413540347996.

The previous prime is 21620310521981. The next prime is 21620310522053. The reversal of 21620310522003 is 30022501302612.

It is a happy number.

21620310522003 is a `hidden beast` number, since 2 + 1 + 620 + 3 + 10 + 5 + 2 + 20 + 0 + 3 = 666.

It is not a de Polignac number, because 21620310522003 - 2¹³ = 21620310513811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21620310522053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1201128362325 + ... + 1201128362342.

It is an arithmetic number, because the mean of its divisors is an integer number (5204889570114).

Almost surely, 2^{21620310522003} is an apocalyptic number.

21620310522003 is a deficient number, since it is larger than the sum of its proper divisors (9609026898681).

21620310522003 is a wasteful number, since it uses less digits than its factorization.

21620310522003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402256724673 (or 2402256724670 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21620310522003 its reverse (30022501302612), we get a palindrome (51642811824615).

The spelling of 21620310522003 in words is "twenty-one trillion, six hundred twenty billion, three hundred ten million, five hundred twenty-two thousand, three".