20357442 has 36 divisors (see below), whose sum is σ = 51311286. Its totient is φ = 5816160.

The previous prime is 20357411. The next prime is 20357453. The reversal of 20357442 is 24475302.

It can be written as a sum of positive squares in only one way, i.e., 17464041 + 2893401 = 4179^2 + 1701^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10659 + ... + 12422.

Almost surely, 2^20357442 is an apocalyptic number.

20357442 is an abundant number, since it is smaller than the sum of its proper divisors (30953844).

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

20357442 is a wasteful number, since it uses less digits than its factorization.

20357442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23103 (or 23093 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 20357442 is about 4511.9222067762. The cubic root of 20357442 is about 273.0493007610.

The spelling of 20357442 in words is "twenty million, three hundred fifty-seven thousand, four hundred forty-two".