21355466400730 has 32 divisors (see below), whose sum is σ = 47924994729600. Its totient is φ = 6656249267520.

The previous prime is 21355466400707. The next prime is 21355466400731. The reversal of 21355466400730 is 3700466455312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21355466400731) 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, 13867185205 + ... + 13867186744.

It is an arithmetic number, because the mean of its divisors is an integer number (1497656085300).

Almost surely, 2^{21355466400730} is an apocalyptic number.

21355466400730 is an abundant number, since it is smaller than the sum of its proper divisors (26569528328870).

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

21355466400730 is a wasteful number, since it uses less digits than its factorization.

21355466400730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27734371974.

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 21355466400730 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred sixty-six million, four hundred thousand, seven hundred thirty".