20451237753 has 4 divisors (see below), whose sum is σ = 27268317008. Its totient is φ = 13634158500.

The previous prime is 20451237749. The next prime is 20451237767. The reversal of 20451237753 is 35773215402.

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 20451237753 - 2² = 20451237749 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20451237743) 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, 3408539623 + ... + 3408539628.

It is an arithmetic number, because the mean of its divisors is an integer number (6817079252).

Almost surely, 2^20451237753 is an apocalyptic number.

It is an amenable number.

20451237753 is a deficient number, since it is larger than the sum of its proper divisors (6817079255).

20451237753 is an equidigital number, since it uses as much as digits as its factorization.

20451237753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6817079254.

The product of its (nonzero) digits is 176400, while the sum is 39.

The spelling of 20451237753 in words is "twenty billion, four hundred fifty-one million, two hundred thirty-seven thousand, seven hundred fifty-three".