21624165421234 has 16 divisors (see below), whose sum is σ = 33122886524640. Its totient is φ = 10584724040640.

The previous prime is 21624165421231. The next prime is 21624165421273. The reversal of 21624165421234 is 43212456142612.

It is not an unprimeable number, because it can be changed into a prime (21624165421231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380169984 + ... + 380226859.

It is an arithmetic number, because the mean of its divisors is an integer number (2070180407790).

Almost surely, 2^{21624165421234} is an apocalyptic number.

21624165421234 is a deficient number, since it is larger than the sum of its proper divisors (11498721103406).

21624165421234 is a wasteful number, since it uses less digits than its factorization.

21624165421234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760397145.

The product of its digits is 552960, while the sum is 43.

The spelling of 21624165421234 in words is "twenty-one trillion, six hundred twenty-four billion, one hundred sixty-five million, four hundred twenty-one thousand, two hundred thirty-four".