20954646 has 32 divisors (see below), whose sum is σ = 48175200. Its totient is φ = 6743520.

The previous prime is 20954639. The next prime is 20954653. The reversal of 20954646 is 64645902.

20954646 is a `hidden beast` number, since 2 + 0 + 9 + 5 + 4 + 646 = 666.

It is an interprime number because it is at equal distance from previous prime (20954639) and next prime (20954653).

It is a self number, because there is not a number n which added to its sum of digits gives 20954646.

It is a congruent 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, 5125 + ... + 8256.

It is an arithmetic number, because the mean of its divisors is an integer number (1505475).

Almost surely, 2^20954646 is an apocalyptic number.

20954646 is an abundant number, since it is smaller than the sum of its proper divisors (27220554).

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

20954646 is a wasteful number, since it uses less digits than its factorization.

20954646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13421 (or 13415 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 20954646 is about 4577.6244931187. The cubic root of 20954646 is about 275.6936582163.

The spelling of 20954646 in words is "twenty million, nine hundred fifty-four thousand, six hundred forty-six".