21477430117761 has 8 divisors (see below), whose sum is σ = 28639025928384. Its totient is φ = 14317060526160.

The previous prime is 21477430117739. The next prime is 21477430117823. The reversal of 21477430117761 is 16771103477412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21477430117761 - 2³³ = 21468840183169 is a prime.

It is a super-2 number, since 2×21477430117761² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21477430117261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306513885 + ... + 306583946.

It is an arithmetic number, because the mean of its divisors is an integer number (3579878241048).

Almost surely, 2^{21477430117761} is an apocalyptic number.

It is an amenable number.

21477430117761 is a deficient number, since it is larger than the sum of its proper divisors (7161595810623).

21477430117761 is a wasteful number, since it uses less digits than its factorization.

21477430117761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613109511.

The product of its (nonzero) digits is 1382976, while the sum is 51.

The spelling of 21477430117761 in words is "twenty-one trillion, four hundred seventy-seven billion, four hundred thirty million, one hundred seventeen thousand, seven hundred sixty-one".