20251140253 has 4 divisors (see below), whose sum is σ = 21316989760. Its totient is φ = 19185290748.

The previous prime is 20251140233. The next prime is 20251140277. The reversal of 20251140253 is 35204115202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20251140253 - 2¹³ = 20251132061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20251140233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532924725 + ... + 532924762.

It is an arithmetic number, because the mean of its divisors is an integer number (5329247440).

Almost surely, 2^20251140253 is an apocalyptic number.

It is an amenable number.

20251140253 is a deficient number, since it is larger than the sum of its proper divisors (1065849507).

20251140253 is a wasteful number, since it uses less digits than its factorization.

20251140253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065849506.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20251140253 its reverse (35204115202), we get a palindrome (55455255455).

The spelling of 20251140253 in words is "twenty billion, two hundred fifty-one million, one hundred forty thousand, two hundred fifty-three".