20755144 has 16 divisors (see below), whose sum is σ = 40964400. Its totient is φ = 9831312.

The previous prime is 20755139. The next prime is 20755157. The reversal of 20755144 is 44155702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68122 + ... + 68425.

It is an arithmetic number, because the mean of its divisors is an integer number (2560275).

Almost surely, 2^20755144 is an apocalyptic number.

It is an amenable number.

20755144 is a deficient number, since it is larger than the sum of its proper divisors (20209256).

20755144 is a wasteful number, since it uses less digits than its factorization.

20755144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136572 (or 136568 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 20755144 is about 4555.7813819366. The cubic root of 20755144 is about 274.8159385405.

The spelling of 20755144 in words is "twenty million, seven hundred fifty-five thousand, one hundred forty-four".