20951394 has 8 divisors (see below), whose sum is σ = 41902800. Its totient is φ = 6983796.

The previous prime is 20951387. The next prime is 20951407. The reversal of 20951394 is 49315902.

It is a sphenic number, since it is the product of 3 distinct primes.

20951394 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1745944 + ... + 1745955.

It is an arithmetic number, because the mean of its divisors is an integer number (5237850).

Almost surely, 2^20951394 is an apocalyptic number.

20951394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20951394 is a wasteful number, since it uses less digits than its factorization.

20951394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491904.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 20951394 is about 4577.2692732676. The cubic root of 20951394 is about 275.6793956329.

The spelling of 20951394 in words is "twenty million, nine hundred fifty-one thousand, three hundred ninety-four".