20225023251 has 16 divisors (see below), whose sum is σ = 28153515264. Its totient is φ = 12890538144.

The previous prime is 20225023243. The next prime is 20225023261. The reversal of 20225023251 is 15232052202.

It is not a de Polignac number, because 20225023251 - 2³ = 20225023243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20225023241) 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, 63345 + ... + 210861.

It is an arithmetic number, because the mean of its divisors is an integer number (1759594704).

Almost surely, 2^20225023251 is an apocalyptic number.

20225023251 is a deficient number, since it is larger than the sum of its proper divisors (7928492013).

20225023251 is a wasteful number, since it uses less digits than its factorization.

20225023251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149530.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20225023251 its reverse (15232052202), we get a palindrome (35457075453).

The spelling of 20225023251 in words is "twenty billion, two hundred twenty-five million, twenty-three thousand, two hundred fifty-one".