21403214332 has 6 divisors (see below), whose sum is σ = 37455625088. Its totient is φ = 10701607164.

The previous prime is 21403214311. The next prime is 21403214347. The reversal of 21403214332 is 23341230412.

It is a junction number, because it is equal to n+sod(n) for n = 21403214297 and 21403214306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2675401788 + ... + 2675401795.

Almost surely, 2^21403214332 is an apocalyptic number.

It is an amenable number.

21403214332 is a deficient number, since it is larger than the sum of its proper divisors (16052410756).

21403214332 is a wasteful number, since it uses less digits than its factorization.

21403214332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350803587 (or 5350803585 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21403214332 its reverse (23341230412), we get a palindrome (44744444744).

The spelling of 21403214332 in words is "twenty-one billion, four hundred three million, two hundred fourteen thousand, three hundred thirty-two".