20790776736 has 96 divisors (see below), whose sum is σ = 61388611200. Its totient is φ = 6930235584.

The previous prime is 20790776719. The next prime is 20790776749. The reversal of 20790776736 is 63767709702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 78556 + ... + 218523.

It is an arithmetic number, because the mean of its divisors is an integer number (639464700).

Almost surely, 2^20790776736 is an apocalyptic number.

It is an amenable number.

20790776736 is an abundant number, since it is smaller than the sum of its proper divisors (40597834464).

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

20790776736 is an frugal number, since it uses more digits than its factorization.

20790776736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297110 (or 297084 counting only the distinct ones).

The product of its (nonzero) digits is 4667544, while the sum is 54.

The spelling of 20790776736 in words is "twenty billion, seven hundred ninety million, seven hundred seventy-six thousand, seven hundred thirty-six".