20654431 has 8 divisors (see below), whose sum is σ = 24087200. Its totient is φ = 17703504.

The previous prime is 20654429. The next prime is 20654441. The reversal of 20654431 is 13445602.

It is not a de Polignac number, because 20654431 - 2¹ = 20654429 is a prime.

It is a super-2 number, since 2×20654431² = 853211039867522, 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 = 20654396 and 20654405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20654411) 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, 29766 + ... + 30451.

It is an arithmetic number, because the mean of its divisors is an integer number (3010900).

Almost surely, 2^20654431 is an apocalyptic number.

20654431 is a deficient number, since it is larger than the sum of its proper divisors (3432769).

20654431 is an frugal number, since it uses more digits than its factorization.

20654431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60238 (or 60224 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20654431 is about 4544.7146225038. The cubic root of 20654431 is about 274.3707087295.

The spelling of 20654431 in words is "twenty million, six hundred fifty-four thousand, four hundred thirty-one".