21230146644424 has 16 divisors (see below), whose sum is σ = 40732258097520. Its totient is φ = 10368211151760.

The previous prime is 21230146644379. The next prime is 21230146644451. The reversal of 21230146644424 is 42444664103212.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30857770942 + ... + 30857771629.

It is an arithmetic number, because the mean of its divisors is an integer number (2545766131095).

Almost surely, 2^{21230146644424} is an apocalyptic number.

It is an amenable number.

21230146644424 is a deficient number, since it is larger than the sum of its proper divisors (19502111453096).

21230146644424 is a wasteful number, since it uses less digits than its factorization.

21230146644424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61715542620 (or 61715542616 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 43.

The spelling of 21230146644424 in words is "twenty-one trillion, two hundred thirty billion, one hundred forty-six million, six hundred forty-four thousand, four hundred twenty-four".