20621320302 has 32 divisors (see below), whose sum is σ = 45055532160. Its totient is φ = 6240057120.

The previous prime is 20621320253. The next prime is 20621320333. The reversal of 20621320302 is 20302312602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173548 + ... + 267135.

It is an arithmetic number, because the mean of its divisors is an integer number (1407985380).

Almost surely, 2^20621320302 is an apocalyptic number.

20621320302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20621320302 is an abundant number, since it is smaller than the sum of its proper divisors (24434211858).

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

20621320302 is a wasteful number, since it uses less digits than its factorization.

20621320302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441408.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20621320302 its reverse (20302312602), we get a palindrome (40923632904).

The spelling of 20621320302 in words is "twenty billion, six hundred twenty-one million, three hundred twenty thousand, three hundred two".