21476522223425 has 12 divisors (see below), whose sum is σ = 26630947044156. Its totient is φ = 17181179400000.

The previous prime is 21476522223361. The next prime is 21476522223433. The reversal of 21476522223425 is 52432222567412.

It can be written as a sum of positive squares in 6 ways, for example, as 1017120658576 + 20459401564849 = 1008524^2 + 4523207^2 .

It is not a de Polignac number, because 21476522223425 - 2⁶ = 21476522223361 is a prime.

It is a super-2 number, since 2×21476522223425² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21476522223425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17182175 + ... + 18389675.

It is an arithmetic number, because the mean of its divisors is an integer number (2219245587013).

Almost surely, 2^{21476522223425} is an apocalyptic number.

21476522223425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21476522223425 is a deficient number, since it is larger than the sum of its proper divisors (5154424820731).

21476522223425 is a wasteful number, since it uses less digits than its factorization.

21476522223425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918948 (or 1918943 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 47.

The spelling of 21476522223425 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred twenty-two million, two hundred twenty-three thousand, four hundred twenty-five".