20956474 has 48 divisors (see below), whose sum is σ = 40219200. Its totient is φ = 8015040.

The previous prime is 20956451. The next prime is 20956493. The reversal of 20956474 is 47465902.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150697 + ... + 150835.

It is an arithmetic number, because the mean of its divisors is an integer number (837900).

Almost surely, 2^20956474 is an apocalyptic number.

20956474 is a deficient number, since it is larger than the sum of its proper divisors (19262726).

20956474 is a wasteful number, since it uses less digits than its factorization.

20956474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 20956474 is about 4577.8241556443. The cubic root of 20956474 is about 275.7016747894.

The spelling of 20956474 in words is "twenty million, nine hundred fifty-six thousand, four hundred seventy-four".