21435155551330 has 32 divisors (see below), whose sum is σ = 39404587622400. Its totient is φ = 8391552995520.

The previous prime is 21435155551309. The next prime is 21435155551349. The reversal of 21435155551330 is 3315555153412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73550100 + ... + 73840960.

It is an arithmetic number, because the mean of its divisors is an integer number (1231393363200).

Almost surely, 2^{21435155551330} is an apocalyptic number.

21435155551330 is a deficient number, since it is larger than the sum of its proper divisors (17969432071070).

21435155551330 is a wasteful number, since it uses less digits than its factorization.

21435155551330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447714.

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 21435155551330 in words is "twenty-one trillion, four hundred thirty-five billion, one hundred fifty-five million, five hundred fifty-one thousand, three hundred thirty".