21442023402354 has 16 divisors (see below), whose sum is σ = 47648940894240. Its totient is φ = 7147341134100.

The previous prime is 21442023402337. The next prime is 21442023402361. The reversal of 21442023402354 is 45320432024412.

21442023402354 is a `hidden beast` number, since 2 + 1 + 44 + 202 + 3 + 402 + 3 + 5 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198537253672 + ... + 198537253779.

It is an arithmetic number, because the mean of its divisors is an integer number (2978058805890).

Almost surely, 2^{21442023402354} is an apocalyptic number.

21442023402354 is an abundant number, since it is smaller than the sum of its proper divisors (26206917491886).

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

21442023402354 is a wasteful number, since it uses less digits than its factorization.

21442023402354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397074507462 (or 397074507456 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 36.

Adding to 21442023402354 its reverse (45320432024412), we get a palindrome (66762455426766).

The spelling of 21442023402354 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, three hundred fifty-four".