20146431 has 16 divisors (see below), whose sum is σ = 27535104. Its totient is φ = 13098624.

The previous prime is 20146421. The next prime is 20146433. The reversal of 20146431 is 13464102.

It is not a de Polignac number, because 20146431 - 2¹⁰ = 20145407 is a prime.

It is a super-2 number, since 2×20146431² = 811757364075522, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 20146398 and 20146407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22270 + ... + 23156.

It is an arithmetic number, because the mean of its divisors is an integer number (1720944).

Almost surely, 2^20146431 is an apocalyptic number.

20146431 is a deficient number, since it is larger than the sum of its proper divisors (7388673).

20146431 is a wasteful number, since it uses less digits than its factorization.

20146431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20146431 is about 4488.4775815414. The cubic root of 20146431 is about 272.1026096069.

The spelling of 20146431 in words is "twenty million, one hundred forty-six thousand, four hundred thirty-one".