20315954 has 4 divisors (see below), whose sum is σ = 30473934. Its totient is φ = 10157976.

The previous prime is 20315917. The next prime is 20316017. The reversal of 20315954 is 45951302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17347225 + 2968729 = 4165^2 + 1723^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078987 + ... + 5078990.

Almost surely, 2^20315954 is an apocalyptic number.

20315954 is a deficient number, since it is larger than the sum of its proper divisors (10157980).

20315954 is a wasteful number, since it uses less digits than its factorization.

20315954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10157979.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 20315954 is about 4507.3222649374. The cubic root of 20315954 is about 272.8636852058.

The spelling of 20315954 in words is "twenty million, three hundred fifteen thousand, nine hundred fifty-four".