20245112251 has 16 divisors (see below), whose sum is σ = 25776273600. Its totient is φ = 15465760128.

The previous prime is 20245112231. The next prime is 20245112257. The reversal of 20245112251 is 15221154202.

It is not a de Polignac number, because 20245112251 - 2¹³ = 20245104059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20245112257) 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, 3833116 + ... + 3838393.

It is an arithmetic number, because the mean of its divisors is an integer number (1611017100).

Almost surely, 2^20245112251 is an apocalyptic number.

20245112251 is a deficient number, since it is larger than the sum of its proper divisors (5531161349).

20245112251 is a wasteful number, since it uses less digits than its factorization.

20245112251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7671558.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 20245112251 its reverse (15221154202), we get a palindrome (35466266453).

It can be divided in two parts, 20245 and 112251, that added together give a square (132496 = 364²).

The spelling of 20245112251 in words is "twenty billion, two hundred forty-five million, one hundred twelve thousand, two hundred fifty-one".