20313955 has 4 divisors (see below), whose sum is σ = 24376752. Its totient is φ = 16251160.

The previous prime is 20313941. The next prime is 20313961. The reversal of 20313955 is 55931302.

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

It is a de Polignac number, because none of the positive numbers 2^k-20313955 is a prime.

It is a Duffinian 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, 2031391 + ... + 2031400.

It is an arithmetic number, because the mean of its divisors is an integer number (6094188).

Almost surely, 2^20313955 is an apocalyptic number.

20313955 is a deficient number, since it is larger than the sum of its proper divisors (4062797).

20313955 is an equidigital number, since it uses as much as digits as its factorization.

20313955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062796.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 20313955 is about 4507.1005091966. The cubic root of 20313955 is about 272.8547353857.

The spelling of 20313955 in words is "twenty million, three hundred thirteen thousand, nine hundred fifty-five".