20474142 has 16 divisors (see below), whose sum is σ = 44098320. Its totient is φ = 6299712.

The previous prime is 20474123. The next prime is 20474143. The reversal of 20474142 is 24147402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474143) 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, 131167 + ... + 131322.

It is an arithmetic number, because the mean of its divisors is an integer number (2756145).

Almost surely, 2^20474142 is an apocalyptic number.

20474142 is an abundant number, since it is smaller than the sum of its proper divisors (23624178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20474142 is a wasteful number, since it uses less digits than its factorization.

20474142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262507.

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 20474142 is about 4524.8361296294. The cubic root of 20474142 is about 273.5700629414.

The spelling of 20474142 in words is "twenty million, four hundred seventy-four thousand, one hundred forty-two".