11742021737 has 6 divisors (see below), whose sum is σ = 12473359038. Its totient is φ = 11051314304.

The previous prime is 11742021727. The next prime is 11742021751. The reversal of 11742021737 is 73712024711.

It can be written as a sum of positive squares in 3 ways, for example, as 3959429776 + 7782591961 = 62924^2 + 88219^2 .

It is not a de Polignac number, because 11742021737 - 2⁶ = 11742021673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11742021697 and 11742021706.

It is not an unprimeable number, because it can be changed into a prime (11742021727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20314628 + ... + 20315205.

It is an arithmetic number, because the mean of its divisors is an integer number (2078893173).

Almost surely, 2^11742021737 is an apocalyptic number.

11742021737 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11742021737 is a deficient number, since it is larger than the sum of its proper divisors (731337301).

11742021737 is an equidigital number, since it uses as much as digits as its factorization.

11742021737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40629867 (or 40629850 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 35.

The spelling of 11742021737 in words is "eleven billion, seven hundred forty-two million, twenty-one thousand, seven hundred thirty-seven".