20131254501 has 4 divisors (see below), whose sum is σ = 26841672672. Its totient is φ = 13420836332.

The previous prime is 20131254467. The next prime is 20131254571. The reversal of 20131254501 is 10545213102.

It is a happy number.

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 20131254501 - 2³¹ = 17983770853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131254571) 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, 3355209081 + ... + 3355209086.

It is an arithmetic number, because the mean of its divisors is an integer number (6710418168).

Almost surely, 2^20131254501 is an apocalyptic number.

It is an amenable number.

20131254501 is a deficient number, since it is larger than the sum of its proper divisors (6710418171).

20131254501 is an equidigital number, since it uses as much as digits as its factorization.

20131254501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6710418170.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 20131254501 its reverse (10545213102), we get a palindrome (30676467603).

The spelling of 20131254501 in words is "twenty billion, one hundred thirty-one million, two hundred fifty-four thousand, five hundred one".