20055431 has 8 divisors (see below), whose sum is σ = 23030400. Its totient is φ = 17272440.

The previous prime is 20055407. The next prime is 20055433. The reversal of 20055431 is 13455002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20055431 is a prime.

It is a super-2 number, since 2×20055431² = 804440625191522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055433) 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, 47771 + ... + 48188.

It is an arithmetic number, because the mean of its divisors is an integer number (2878800).

Almost surely, 2^20055431 is an apocalyptic number.

20055431 is a deficient number, since it is larger than the sum of its proper divisors (2974969).

20055431 is a wasteful number, since it uses less digits than its factorization.

20055431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95989.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20055431 is about 4478.3290410598. The cubic root of 20055431 is about 271.6923018118.

The spelling of 20055431 in words is "twenty million, fifty-five thousand, four hundred thirty-one".