20251055 has 16 divisors (see below), whose sum is σ = 27907200. Its totient is φ = 13952160.

The previous prime is 20251051. The next prime is 20251061. The reversal of 20251055 is 55015202.

It is not a de Polignac number, because 20251055 - 2² = 20251051 is a prime.

It is a super-2 number, since 2×20251055² = 820210457226050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20251051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8645 + ... + 10734.

It is an arithmetic number, because the mean of its divisors is an integer number (1744200).

Almost surely, 2^20251055 is an apocalyptic number.

20251055 is a deficient number, since it is larger than the sum of its proper divisors (7656145).

20251055 is a wasteful number, since it uses less digits than its factorization.

20251055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19414.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 20251055 is about 4500.1172206955. The cubic root of 20251055 is about 272.5728223296.

Adding to 20251055 its reverse (55015202), we get a palindrome (75266257).

The spelling of 20251055 in words is "twenty million, two hundred fifty-one thousand, fifty-five".