20474207 has 4 divisors (see below), whose sum is σ = 22049160. Its totient is φ = 18899256.

The previous prime is 20474161. The next prime is 20474221. The reversal of 20474207 is 70247402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70247402 = 2 ⋅35123701.

It is a cyclic number.

It is not a de Polignac number, because 20474207 - 2⁶ = 20474143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787457 + ... + 787482.

It is an arithmetic number, because the mean of its divisors is an integer number (5512290).

Almost surely, 2^20474207 is an apocalyptic number.

20474207 is a deficient number, since it is larger than the sum of its proper divisors (1574953).

20474207 is a wasteful number, since it uses less digits than its factorization.

20474207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574952.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 20474207 is about 4524.8433122043. The cubic root of 20474207 is about 273.5703524453.

The spelling of 20474207 in words is "twenty million, four hundred seventy-four thousand, two hundred seven".