20472814 has 4 divisors (see below), whose sum is σ = 30709224. Its totient is φ = 10236406.

The previous prime is 20472797. The next prime is 20472821. The reversal of 20472814 is 41827402.

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

It is a super-2 number, since 2×20472814² = 838272226157192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5118202 + ... + 5118205.

It is an arithmetic number, because the mean of its divisors is an integer number (7677306).

Almost surely, 2^20472814 is an apocalyptic number.

20472814 is a deficient number, since it is larger than the sum of its proper divisors (10236410).

20472814 is a wasteful number, since it uses less digits than its factorization.

20472814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10236409.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 20472814 is about 4524.6893816040. The cubic root of 20472814 is about 273.5641480187.

The spelling of 20472814 in words is "twenty million, four hundred seventy-two thousand, eight hundred fourteen".