20139782674 has 8 divisors (see below), whose sum is σ = 32956008048. Its totient is φ = 9154446660.

The previous prime is 20139782653. The next prime is 20139782699. The reversal of 20139782674 is 47628793102.

It is a happy number.

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

It is a super-2 number, since 2×20139782674² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457722312 + ... + 457722355.

It is an arithmetic number, because the mean of its divisors is an integer number (4119501006).

Almost surely, 2^20139782674 is an apocalyptic number.

20139782674 is a deficient number, since it is larger than the sum of its proper divisors (12816225374).

20139782674 is a wasteful number, since it uses less digits than its factorization.

20139782674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915444680.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 20139782674 in words is "twenty billion, one hundred thirty-nine million, seven hundred eighty-two thousand, six hundred seventy-four".