20255751 has 12 divisors (see below), whose sum is σ = 30342312. Its totient is φ = 13503672.

The previous prime is 20255743. The next prime is 20255771. The reversal of 20255751 is 15755202.

It is a happy number.

It is not a de Polignac number, because 20255751 - 2³ = 20255743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20255771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41436 + ... + 41921.

It is an arithmetic number, because the mean of its divisors is an integer number (2528526).

Almost surely, 2^20255751 is an apocalyptic number.

20255751 is a deficient number, since it is larger than the sum of its proper divisors (10086561).

20255751 is an frugal number, since it uses more digits than its factorization.

20255751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83372 (or 83360 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 20255751 is about 4500.6389546374. The cubic root of 20255751 is about 272.5938895949.

It can be divided in two parts, 2025 and 5751, that added together give a 5-th power (7776 = 6⁵).

The spelling of 20255751 in words is "twenty million, two hundred fifty-five thousand, seven hundred fifty-one".