21343532040 has 48 divisors (see below), whose sum is σ = 69366480300. Its totient is φ = 5691608448.

The previous prime is 21343532039. The next prime is 21343532059. The reversal of 21343532040 is 4023534312.

21343532040 is a `hidden beast` number, since 21 + 3 + 435 + 3 + 204 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19764423396 + 1579108644 = 140586^2 + 39738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21343531995 and 21343532013.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29643435 + ... + 29644154.

Almost surely, 2^21343532040 is an apocalyptic number.

21343532040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21343532040 is an abundant number, since it is smaller than the sum of its proper divisors (48022948260).

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

21343532040 is a wasteful number, since it uses less digits than its factorization.

21343532040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59287606 (or 59287599 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The spelling of 21343532040 in words is "twenty-one billion, three hundred forty-three million, five hundred thirty-two thousand, forty".