21477366454362 has 128 divisors (see below), whose sum is σ = 55174195077120. Its totient is φ = 5417273537280.

The previous prime is 21477366454319. The next prime is 21477366454373. The reversal of 21477366454362 is 26345466377412.

It is a super-2 number, since 2×21477366454362² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21477366454296 and 21477366454305.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86161564 + ... + 86410472.

It is an arithmetic number, because the mean of its divisors is an integer number (431048399040).

Almost surely, 2^{21477366454362} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21477366454362, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27587097538560).

21477366454362 is an abundant number, since it is smaller than the sum of its proper divisors (33696828622758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21477366454362 is a wasteful number, since it uses less digits than its factorization.

21477366454362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255828.

The product of its digits is 121927680, while the sum is 60.

The spelling of 21477366454362 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred sixty-six million, four hundred fifty-four thousand, three hundred sixty-two".