21267069403980 has 24 divisors (see below), whose sum is σ = 59547794331312. Its totient is φ = 5671218507712.

The previous prime is 21267069403949. The next prime is 21267069404003. The reversal of 21267069403980 is 8930496076212.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21267069403980.

It is an unprimeable number.

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, 177225578307 + ... + 177225578426.

It is an arithmetic number, because the mean of its divisors is an integer number (2481158097138).

Almost surely, 2^{21267069403980} is an apocalyptic number.

21267069403980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21267069403980 is an abundant number, since it is smaller than the sum of its proper divisors (38280724927332).

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

21267069403980 is a wasteful number, since it uses less digits than its factorization.

21267069403980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354451156745 (or 354451156743 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 21267069403980 in words is "twenty-one trillion, two hundred sixty-seven billion, sixty-nine million, four hundred three thousand, nine hundred eighty".