20636221724 has 12 divisors (see below), whose sum is σ = 36115545648. Its totient is φ = 10317494400.

The previous prime is 20636221699. The next prime is 20636221733. The reversal of 20636221724 is 42712263602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74192 + ... + 216279.

It is an arithmetic number, because the mean of its divisors is an integer number (3009628804).

Almost surely, 2^20636221724 is an apocalyptic number.

It is an amenable number.

20636221724 is a deficient number, since it is larger than the sum of its proper divisors (15479323924).

20636221724 is a wasteful number, since it uses less digits than its factorization.

20636221724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308236 (or 308234 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 20636221724 in words is "twenty billion, six hundred thirty-six million, two hundred twenty-one thousand, seven hundred twenty-four".