20983432 has 16 divisors (see below), whose sum is σ = 40181760. Its totient is φ = 10268304.

The previous prime is 20983399. The next prime is 20983439. The reversal of 20983432 is 23438902.

It is a junction number, because it is equal to n+sod(n) for n = 20983394 and 20983403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20983439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27528 + ... + 28279.

It is an arithmetic number, because the mean of its divisors is an integer number (2511360).

Almost surely, 2^20983432 is an apocalyptic number.

It is an amenable number.

20983432 is a deficient number, since it is larger than the sum of its proper divisors (19198328).

20983432 is a wasteful number, since it uses less digits than its factorization.

20983432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55860 (or 55856 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 20983432 is about 4580.7676212617. The cubic root of 20983432 is about 275.8198432223.

The spelling of 20983432 in words is "twenty million, nine hundred eighty-three thousand, four hundred thirty-two".