20251140254 has 16 divisors (see below), whose sum is σ = 30605612400. Its totient is φ = 10049304384.

The previous prime is 20251140233. The next prime is 20251140277. The reversal of 20251140254 is 45204115202.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2074517 + ... + 2084255.

It is an arithmetic number, because the mean of its divisors is an integer number (1912850775).

Almost surely, 2^20251140254 is an apocalyptic number.

20251140254 is a deficient number, since it is larger than the sum of its proper divisors (10354472146).

20251140254 is a wasteful number, since it uses less digits than its factorization.

20251140254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17467.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 20251140254 its reverse (45204115202), we get a palindrome (65455255456).

The spelling of 20251140254 in words is "twenty billion, two hundred fifty-one million, one hundred forty thousand, two hundred fifty-four".