21234160242 has 24 divisors (see below), whose sum is σ = 46013844240. Its totient is φ = 7077053880.

The previous prime is 21234160229. The next prime is 21234160243. The reversal of 21234160242 is 24206143212.

21234160242 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 416 + 0 + 242 = 666.

It is a super-2 number, since 2×21234160242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21234160243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53809 + ... + 212987.

It is an arithmetic number, because the mean of its divisors is an integer number (1917243510).

Almost surely, 2^21234160242 is an apocalyptic number.

21234160242 is an abundant number, since it is smaller than the sum of its proper divisors (24779683998).

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

21234160242 is a wasteful number, since it uses less digits than its factorization.

21234160242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166598 (or 166595 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

It can be divided in two parts, 21234 and 160242, that added together give a square (181476 = 426²).

The spelling of 21234160242 in words is "twenty-one billion, two hundred thirty-four million, one hundred sixty thousand, two hundred forty-two".