20651651048 has 32 divisors (see below), whose sum is σ = 44283240000. Its totient is φ = 8844767232.

The previous prime is 20651651039. The next prime is 20651651081. The reversal of 20651651048 is 84015615602.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39065 + ... + 206952.

It is an arithmetic number, because the mean of its divisors is an integer number (1383851250).

Almost surely, 2^20651651048 is an apocalyptic number.

20651651048 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20651651048 is an abundant number, since it is smaller than the sum of its proper divisors (23631588952).

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

20651651048 is a wasteful number, since it uses less digits than its factorization.

20651651048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247529 (or 247525 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 20651651048 in words is "twenty billion, six hundred fifty-one million, six hundred fifty-one thousand, forty-eight".