20749239627 has 8 divisors (see below), whose sum is σ = 27675555216. Its totient is φ = 13827875232.

The previous prime is 20749239587. The next prime is 20749239647. The reversal of 20749239627 is 72693294702.

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

It is not a de Polignac number, because 20749239627 - 2⁷ = 20749239499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20749239627.

It is not an unprimeable number, because it can be changed into a prime (20749239647) 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, 1228008 + ... + 1244789.

It is an arithmetic number, because the mean of its divisors is an integer number (3459444402).

Almost surely, 2^20749239627 is an apocalyptic number.

20749239627 is a deficient number, since it is larger than the sum of its proper divisors (6926315589).

20749239627 is a wasteful number, since it uses less digits than its factorization.

20749239627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475597.

The product of its (nonzero) digits is 2286144, while the sum is 51.

The spelling of 20749239627 in words is "twenty billion, seven hundred forty-nine million, two hundred thirty-nine thousand, six hundred twenty-seven".