21540324377202 has 32 divisors (see below), whose sum is σ = 44686394541888. Its totient is φ = 6917058602496.

The previous prime is 21540324377189. The next prime is 21540324377203. The reversal of 21540324377202 is 20277342304512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21540324377203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571827943 + ... + 571865610.

It is an arithmetic number, because the mean of its divisors is an integer number (1396449829434).

Almost surely, 2^{21540324377202} is an apocalyptic number.

21540324377202 is an abundant number, since it is smaller than the sum of its proper divisors (23146070164686).

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

21540324377202 is a wasteful number, since it uses less digits than its factorization.

21540324377202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143693674.

The product of its (nonzero) digits is 564480, while the sum is 42.

The spelling of 21540324377202 in words is "twenty-one trillion, five hundred forty billion, three hundred twenty-four million, three hundred seventy-seven thousand, two hundred two".