21150216301456 has 160 divisors (see below), whose sum is σ = 47313416747520. Its totient is φ = 9058160793600.

The previous prime is 21150216301261. The next prime is 21150216301531. The reversal of 21150216301456 is 65410361205112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634229775 + ... + 634263121.

It is an arithmetic number, because the mean of its divisors is an integer number (295708854672).

Almost surely, 2^{21150216301456} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21150216301456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23656708373760).

21150216301456 is an abundant number, since it is smaller than the sum of its proper divisors (26163200446064).

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

21150216301456 is a wasteful number, since it uses less digits than its factorization.

21150216301456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34413 (or 34407 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 21150216301456 its reverse (65410361205112), we get a palindrome (86560577506568).

The spelling of 21150216301456 in words is "twenty-one trillion, one hundred fifty billion, two hundred sixteen million, three hundred one thousand, four hundred fifty-six".