20126261744501 has 4 divisors (see below), whose sum is σ = 21955921903104. Its totient is φ = 18296601585900.

The previous prime is 20126261744473. The next prime is 20126261744569. The reversal of 20126261744501 is 10544716262102.

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 not a de Polignac number, because 20126261744501 - 2⁶ = 20126261744437 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 (20126261744591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914830079285 + ... + 914830079306.

It is an arithmetic number, because the mean of its divisors is an integer number (5488980475776).

Almost surely, 2^{20126261744501} is an apocalyptic number.

It is an amenable number.

20126261744501 is a deficient number, since it is larger than the sum of its proper divisors (1829660158603).

20126261744501 is a wasteful number, since it uses less digits than its factorization.

20126261744501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829660158602.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 20126261744501 in words is "twenty trillion, one hundred twenty-six billion, two hundred sixty-one million, seven hundred forty-four thousand, five hundred one".