20374947 has 12 divisors (see below), whose sum is σ = 29735160. Its totient is φ = 13442688.

The previous prime is 20374943. The next prime is 20374951. The reversal of 20374947 is 74947302.

It is an interprime number because it is at equal distance from previous prime (20374943) and next prime (20374951).

It is not a de Polignac number, because 20374947 - 2² = 20374943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20374943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10797 + ... + 12542.

It is an arithmetic number, because the mean of its divisors is an integer number (2477930).

Almost surely, 2^20374947 is an apocalyptic number.

20374947 is a deficient number, since it is larger than the sum of its proper divisors (9360213).

20374947 is a wasteful number, since it uses less digits than its factorization.

20374947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23442 (or 23439 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20374947 is about 4513.8616505161. The cubic root of 20374947 is about 273.1275417414.

It can be divided in two parts, 20374 and 947, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 20374947 in words is "twenty million, three hundred seventy-four thousand, nine hundred forty-seven".