20147474 has 4 divisors (see below), whose sum is σ = 30221214. Its totient is φ = 10073736.

The previous prime is 20147459. The next prime is 20147483. The reversal of 20147474 is 47474102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10936249 + 9211225 = 3307^2 + 3035^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5036867 + ... + 5036870.

Almost surely, 2^20147474 is an apocalyptic number.

20147474 is a deficient number, since it is larger than the sum of its proper divisors (10073740).

20147474 is a wasteful number, since it uses less digits than its factorization.

20147474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10073739.

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 20147474 is about 4488.5937664262. The cubic root of 20147474 is about 272.1073051967.

The spelling of 20147474 in words is "twenty million, one hundred forty-seven thousand, four hundred seventy-four".