20313761 has 8 divisors (see below), whose sum is σ = 22827840. Its totient is φ = 17935632.

The previous prime is 20313757. The next prime is 20313767. The reversal of 20313761 is 16731302.

It is a happy number.

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

It is not a de Polignac number, because 20313761 - 2² = 20313757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20313767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33671 + ... + 34268.

It is an arithmetic number, because the mean of its divisors is an integer number (2853480).

Almost surely, 2^20313761 is an apocalyptic number.

It is an amenable number.

20313761 is a deficient number, since it is larger than the sum of its proper divisors (2514079).

20313761 is a wasteful number, since it uses less digits than its factorization.

20313761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67975.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20313761 is about 4507.0789875484. The cubic root of 20313761 is about 272.8538667876.

The spelling of 20313761 in words is "twenty million, three hundred thirteen thousand, seven hundred sixty-one".