20974746 has 32 divisors (see below), whose sum is σ = 47557440. Its totient is φ = 6113664.

The previous prime is 20974741. The next prime is 20974757. The reversal of 20974746 is 64747902.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20974741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5595 + ... + 8558.

It is an arithmetic number, because the mean of its divisors is an integer number (1486170).

Almost surely, 2^20974746 is an apocalyptic number.

20974746 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20974746 is an abundant number, since it is smaller than the sum of its proper divisors (26582694).

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

20974746 is a wasteful number, since it uses less digits than its factorization.

20974746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14190.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 20974746 is about 4579.8194287548. The cubic root of 20974746 is about 275.7817798300.

The spelling of 20974746 in words is "twenty million, nine hundred seventy-four thousand, seven hundred forty-six".