20974146 has 32 divisors (see below), whose sum is σ = 43027200. Its totient is φ = 6813840.

The previous prime is 20974139. The next prime is 20974159. The reversal of 20974146 is 64147902.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63201 + ... + 63531.

It is an arithmetic number, because the mean of its divisors is an integer number (1344600).

Almost surely, 2^20974146 is an apocalyptic number.

20974146 is an abundant number, since it is smaller than the sum of its proper divisors (22053054).

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

20974146 is a wasteful number, since it uses less digits than its factorization.

20974146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20974146 is about 4579.7539235203. The cubic root of 20974146 is about 275.7791501495.

The spelling of 20974146 in words is "twenty million, nine hundred seventy-four thousand, one hundred forty-six".