20756983753 has 8 divisors (see below), whose sum is σ = 22658868576. Its totient is φ = 18857580000.

The previous prime is 20756983747. The next prime is 20756983783. The reversal of 20756983753 is 35738965702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20756983753 - 2⁹ = 20756983241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20756983694 and 20756983703.

It is not an unprimeable number, because it can be changed into a prime (20756983783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602748 + ... + 636253.

It is an arithmetic number, because the mean of its divisors is an integer number (2832358572).

Almost surely, 2^20756983753 is an apocalyptic number.

It is an amenable number.

20756983753 is a deficient number, since it is larger than the sum of its proper divisors (1901884823).

20756983753 is a wasteful number, since it uses less digits than its factorization.

20756983753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240535.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 20756983753 in words is "twenty billion, seven hundred fifty-six million, nine hundred eighty-three thousand, seven hundred fifty-three".