21177462341 has 6 divisors (see below), whose sum is σ = 24635007270. Its totient is φ = 18152110536.

The previous prime is 21177462269. The next prime is 21177462347. The reversal of 21177462341 is 14326477112.

It can be written as a sum of positive squares in only one way, i.e., 11909356900 + 9268105441 = 109130^2 + 96271^2 .

It is not a de Polignac number, because 21177462341 - 2²² = 21173268037 is a prime.

It is a super-2 number, since 2×21177462341² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21177462295 and 21177462304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21177462347) 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, 216096506 + ... + 216096603.

It is an arithmetic number, because the mean of its divisors is an integer number (4105834545).

Almost surely, 2^21177462341 is an apocalyptic number.

It is an amenable number.

21177462341 is a deficient number, since it is larger than the sum of its proper divisors (3457544929).

21177462341 is an equidigital number, since it uses as much as digits as its factorization.

21177462341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432193123 (or 432193116 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The spelling of 21177462341 in words is "twenty-one billion, one hundred seventy-seven million, four hundred sixty-two thousand, three hundred forty-one".