21400354110 has 16 divisors (see below), whose sum is σ = 51360849936. Its totient is φ = 5706761088.

The previous prime is 21400354099. The next prime is 21400354123. The reversal of 21400354110 is 1145300412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356672539 + ... + 356672598.

It is an arithmetic number, because the mean of its divisors is an integer number (3210053121).

Almost surely, 2^21400354110 is an apocalyptic number.

21400354110 is an abundant number, since it is smaller than the sum of its proper divisors (29960495826).

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

21400354110 is a wasteful number, since it uses less digits than its factorization.

21400354110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713345147.

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

Adding to 21400354110 its reverse (1145300412), we get a palindrome (22545654522).

The spelling of 21400354110 in words is "twenty-one billion, four hundred million, three hundred fifty-four thousand, one hundred ten".