20765736630 has 48 divisors (see below), whose sum is σ = 54003259440. Its totient is φ = 5536263744.

The previous prime is 20765736619. The next prime is 20765736631. The reversal of 20765736630 is 3663756702.

20765736630 is a `hidden beast` number, since 2 + 0 + 7 + 6 + 5 + 7 + 3 + 6 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20765736631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 409201 + ... + 457139.

It is an arithmetic number, because the mean of its divisors is an integer number (1125067905).

Almost surely, 2^20765736630 is an apocalyptic number.

20765736630 is an abundant number, since it is smaller than the sum of its proper divisors (33237522810).

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

20765736630 is a wasteful number, since it uses less digits than its factorization.

20765736630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52765 (or 52762 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 45.

The spelling of 20765736630 in words is "twenty billion, seven hundred sixty-five million, seven hundred thirty-six thousand, six hundred thirty".