20757250744 has 16 divisors (see below), whose sum is σ = 38972521800. Its totient is φ = 10364578272.

The previous prime is 20757250741. The next prime is 20757250747. The reversal of 20757250744 is 44705275702.

It is an interprime number because it is at equal distance from previous prime (20757250741) and next prime (20757250747).

It is a self number, because there is not a number n which added to its sum of digits gives 20757250744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20757250741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1749607 + ... + 1761430.

Almost surely, 2^20757250744 is an apocalyptic number.

It is an amenable number.

20757250744 is a deficient number, since it is larger than the sum of its proper divisors (18215271056).

20757250744 is a wasteful number, since it uses less digits than its factorization.

20757250744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511782 (or 3511778 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 43.

The spelling of 20757250744 in words is "twenty billion, seven hundred fifty-seven million, two hundred fifty thousand, seven hundred forty-four".