20742874 has 8 divisors (see below), whose sum is σ = 31464180. Its totient is φ = 10254816.

The previous prime is 20742857. The next prime is 20742881. The reversal of 20742874 is 47824702.

It can be written as a sum of positive squares in 2 ways, for example, as 20657025 + 85849 = 4545^2 + 293^2 .

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

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, 58089 + ... + 58444.

Almost surely, 2^20742874 is an apocalyptic number.

20742874 is a deficient number, since it is larger than the sum of its proper divisors (10721306).

20742874 is a wasteful number, since it uses less digits than its factorization.

20742874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116624.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 20742874 is about 4554.4345422895. The cubic root of 20742874 is about 274.7617727512.

The spelling of 20742874 in words is "twenty million, seven hundred forty-two thousand, eight hundred seventy-four".