20770432 has 16 divisors (see below), whose sum is σ = 41378850. Its totient is φ = 10385152.

The previous prime is 20770429. The next prime is 20770457. The reversal of 20770432 is 23407702.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 484416 = 4504^2 + 696^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 20770397 and 20770406.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81007 + ... + 81262.

Almost surely, 2^20770432 is an apocalyptic number.

It is an amenable number.

20770432 is a deficient number, since it is larger than the sum of its proper divisors (20608418).

20770432 is an equidigital number, since it uses as much as digits as its factorization.

20770432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162283 (or 162271 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20770432 is about 4557.4589411206. The cubic root of 20770432 is about 274.8833973983.

The spelling of 20770432 in words is "twenty million, seven hundred seventy thousand, four hundred thirty-two".