20951442 has 12 divisors (see below), whose sum is σ = 45394830. Its totient is φ = 6983808.

The previous prime is 20951423. The next prime is 20951467. The reversal of 20951442 is 24415902.

It can be written as a sum of positive squares in only one way, i.e., 15848361 + 5103081 = 3981^2 + 2259^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 581967 + ... + 582002.

Almost surely, 2^20951442 is an apocalyptic number.

20951442 is an abundant number, since it is smaller than the sum of its proper divisors (24443388).

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

20951442 is a wasteful number, since it uses less digits than its factorization.

20951442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163977 (or 1163974 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20951442 is about 4577.2745165655. The cubic root of 20951442 is about 275.6796061614.

The spelling of 20951442 in words is "twenty million, nine hundred fifty-one thousand, four hundred forty-two".