11746537421 has 2 divisors, whose sum is σ = 11746537422. Its totient is φ = 11746537420.

The previous prime is 11746537399. The next prime is 11746537423. The reversal of 11746537421 is 12473564711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11653202500 + 93334921 = 107950^2 + 9661^2 .

It is a cyclic number.

It is not a de Polignac number, because 11746537421 - 2¹⁰ = 11746536397 is a prime.

It is a super-2 number, since 2×11746537421² (a number of 21 digits) contains 22 as substring.

Together with 11746537423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11746537423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5873268710 + 5873268711.

It is an arithmetic number, because the mean of its divisors is an integer number (5873268711).

Almost surely, 2^11746537421 is an apocalyptic number.

It is an amenable number.

11746537421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11746537421 is an equidigital number, since it uses as much as digits as its factorization.

11746537421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 41.

The spelling of 11746537421 in words is "eleven billion, seven hundred forty-six million, five hundred thirty-seven thousand, four hundred twenty-one".