21400354102 has 4 divisors (see below), whose sum is σ = 32100531156. Its totient is φ = 10700177050.

The previous prime is 21400354099. The next prime is 21400354123. The reversal of 21400354102 is 20145300412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5350088524 + ... + 5350088527.

It is an arithmetic number, because the mean of its divisors is an integer number (8025132789).

Almost surely, 2^21400354102 is an apocalyptic number.

21400354102 is a deficient number, since it is larger than the sum of its proper divisors (10700177054).

21400354102 is a wasteful number, since it uses less digits than its factorization.

21400354102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10700177053.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21400354102 its reverse (20145300412), we get a palindrome (41545654514).

The spelling of 21400354102 in words is "twenty-one billion, four hundred million, three hundred fifty-four thousand, one hundred two".