21010014354 has 64 divisors (see below), whose sum is σ = 49299664896. Its totient is φ = 5844593664.

The previous prime is 21010014329. The next prime is 21010014391. The reversal of 21010014354 is 45341001012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21010014354.

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, 353409 + ... + 408555.

It is an arithmetic number, because the mean of its divisors is an integer number (770307264).

Almost surely, 2^21010014354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21010014354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24649832448).

21010014354 is an abundant number, since it is smaller than the sum of its proper divisors (28289650542).

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

21010014354 is a wasteful number, since it uses less digits than its factorization.

21010014354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55399.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21010014354 its reverse (45341001012), we get a palindrome (66351015366).

The spelling of 21010014354 in words is "twenty-one billion, ten million, fourteen thousand, three hundred fifty-four".