20915945762 has 4 divisors (see below), whose sum is σ = 31373918646. Its totient is φ = 10457972880.

The previous prime is 20915945723. The next prime is 20915945773. The reversal of 20915945762 is 26754951902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20093346001 + 822599761 = 141751^2 + 28681^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20915945762.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5228986439 + ... + 5228986442.

Almost surely, 2^20915945762 is an apocalyptic number.

20915945762 is a deficient number, since it is larger than the sum of its proper divisors (10457972884).

20915945762 is a wasteful number, since it uses less digits than its factorization.

20915945762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10457972883.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 20915945762 in words is "twenty billion, nine hundred fifteen million, nine hundred forty-five thousand, seven hundred sixty-two".