21477430117762 has 4 divisors (see below), whose sum is σ = 32216145176646. Its totient is φ = 10738715058880.

The previous prime is 21477430117739. The next prime is 21477430117823. The reversal of 21477430117762 is 26771103477412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13709609617201 + 7767820500561 = 3702649^2 + 2787081^2 .

It is a super-2 number, since 2×21477430117762² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5369357529439 + ... + 5369357529442.

Almost surely, 2^{21477430117762} is an apocalyptic number.

21477430117762 is a deficient number, since it is larger than the sum of its proper divisors (10738715058884).

21477430117762 is a wasteful number, since it uses less digits than its factorization.

21477430117762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738715058883.

The product of its (nonzero) digits is 2765952, while the sum is 52.

The spelling of 21477430117762 in words is "twenty-one trillion, four hundred seventy-seven billion, four hundred thirty million, one hundred seventeen thousand, seven hundred sixty-two".