20147974 has 32 divisors (see below), whose sum is σ = 38610432. Its totient is φ = 7656000.

The previous prime is 20147947. The next prime is 20148041. The reversal of 20147974 is 47974102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4719 + ... + 7909.

It is an arithmetic number, because the mean of its divisors is an integer number (1206576).

Almost surely, 2^20147974 is an apocalyptic number.

20147974 is a deficient number, since it is larger than the sum of its proper divisors (18462458).

20147974 is a wasteful number, since it uses less digits than its factorization.

20147974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 20147974 is about 4488.6494628117. The cubic root of 20147974 is about 272.1095561410.

The spelling of 20147974 in words is "twenty million, one hundred forty-seven thousand, nine hundred seventy-four".