20462842 has 4 divisors (see below), whose sum is σ = 30694266. Its totient is φ = 10231420.

The previous prime is 20462837. The next prime is 20462861. The reversal of 20462842 is 24826402.

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., 20241001 + 221841 = 4499^2 + 471^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20462842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5115709 + ... + 5115712.

Almost surely, 2^20462842 is an apocalyptic number.

20462842 is a deficient number, since it is larger than the sum of its proper divisors (10231424).

20462842 is a wasteful number, since it uses less digits than its factorization.

20462842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10231423.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 20462842 is about 4523.5872932884. The cubic root of 20462842 is about 273.5197244770.

The spelling of 20462842 in words is "twenty million, four hundred sixty-two thousand, eight hundred forty-two".