20749962739 has 32 divisors (see below), whose sum is σ = 24278284800. Its totient is φ = 17544764160.

The previous prime is 20749962721. The next prime is 20749962749. The reversal of 20749962739 is 93726994702.

It is not a de Polignac number, because 20749962739 - 2¹⁵ = 20749929971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20749962749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2487127 + ... + 2495455.

It is an arithmetic number, because the mean of its divisors is an integer number (758696400).

Almost surely, 2^20749962739 is an apocalyptic number.

20749962739 is a deficient number, since it is larger than the sum of its proper divisors (3528322061).

20749962739 is a wasteful number, since it uses less digits than its factorization.

20749962739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8635.

The product of its (nonzero) digits is 10287648, while the sum is 58.

The spelling of 20749962739 in words is "twenty billion, seven hundred forty-nine million, nine hundred sixty-two thousand, seven hundred thirty-nine".