21324750942 has 16 divisors (see below), whose sum is σ = 46526729472. Its totient is φ = 6462045720.

The previous prime is 21324750929. The next prime is 21324750943. The reversal of 21324750942 is 24905742312.

It is a self number, because there is not a number n which added to its sum of digits gives 21324750942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324750943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161551078 + ... + 161551209.

It is an arithmetic number, because the mean of its divisors is an integer number (2907920592).

Almost surely, 2^21324750942 is an apocalyptic number.

21324750942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21324750942 is an abundant number, since it is smaller than the sum of its proper divisors (25201978530).

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

21324750942 is a wasteful number, since it uses less digits than its factorization.

21324750942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323102303.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 21324750942 in words is "twenty-one billion, three hundred twenty-four million, seven hundred fifty thousand, nine hundred forty-two".