11844762421 has 2 divisors, whose sum is σ = 11844762422. Its totient is φ = 11844762420.

The previous prime is 11844762389. The next prime is 11844762437. The reversal of 11844762421 is 12426744811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9008667396 + 2836095025 = 94914^2 + 53255^2 .

It is a cyclic number.

It is not a de Polignac number, because 11844762421 - 2⁵ = 11844762389 is a prime.

It is a super-3 number, since 3×11844762421³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11844762451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5922381210 + 5922381211.

It is an arithmetic number, because the mean of its divisors is an integer number (5922381211).

Almost surely, 2^11844762421 is an apocalyptic number.

It is an amenable number.

11844762421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11844762421 is an equidigital number, since it uses as much as digits as its factorization.

11844762421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 40.

The spelling of 11844762421 in words is "eleven billion, eight hundred forty-four million, seven hundred sixty-two thousand, four hundred twenty-one".