13222720620 has 36 divisors (see below), whose sum is σ = 40108919760. Its totient is φ = 3526058784.

The previous prime is 13222720619. The next prime is 13222720657. The reversal of 13222720620 is 2602722231.

13222720620 is a `hidden beast` number, since 1 + 32 + 2 + 2 + 7 + 2 + 0 + 620 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36729600 + ... + 36729959.

It is an arithmetic number, because the mean of its divisors is an integer number (1114136660).

Almost surely, 2^13222720620 is an apocalyptic number.

13222720620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13222720620 is an abundant number, since it is smaller than the sum of its proper divisors (26886199140).

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

13222720620 is a wasteful number, since it uses less digits than its factorization.

13222720620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73459574 (or 73459569 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The spelling of 13222720620 in words is "thirteen billion, two hundred twenty-two million, seven hundred twenty thousand, six hundred twenty".