20373431 has 8 divisors (see below), whose sum is σ = 21975744. Its totient is φ = 18776160.

The previous prime is 20373403. The next prime is 20373449. The reversal of 20373431 is 13437302.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-20373431 is a prime.

It is a super-2 number, since 2×20373431² = 830153381423522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20373397 and 20373406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20373401) 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, 14690 + ... + 16016.

It is an arithmetic number, because the mean of its divisors is an integer number (2746968).

Almost surely, 2^20373431 is an apocalyptic number.

20373431 is a deficient number, since it is larger than the sum of its proper divisors (1602313).

20373431 is a wasteful number, since it uses less digits than its factorization.

20373431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 20373431 is about 4513.6937202252. The cubic root of 20373431 is about 273.1207675459.

The spelling of 20373431 in words is "twenty million, three hundred seventy-three thousand, four hundred thirty-one".