21423604328244 has 120 divisors (see below), whose sum is σ = 58292203236960. Its totient is φ = 6852652301376.

The previous prime is 21423604328233. The next prime is 21423604328251. The reversal of 21423604328244 is 44282340632412.

21423604328244 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 3 + 604 + 32 + 8 + 2 + 4 + 4 = 666.

It is a super-2 number, since 2×21423604328244² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21423604328244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5462554 + ... + 8525649.

It is an arithmetic number, because the mean of its divisors is an integer number (485768360308).

Almost surely, 2^{21423604328244} is an apocalyptic number.

It is an amenable number.

21423604328244 is an abundant number, since it is smaller than the sum of its proper divisors (36868598908716).

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

21423604328244 is a wasteful number, since it uses less digits than its factorization.

21423604328244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13988411 (or 13988400 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 45.

The spelling of 21423604328244 in words is "twenty-one trillion, four hundred twenty-three billion, six hundred four million, three hundred twenty-eight thousand, two hundred forty-four".