21402303354 has 32 divisors (see below), whose sum is σ = 47737512000. Its totient is φ = 7107575472.

The previous prime is 21402303313. The next prime is 21402303371. The reversal of 21402303354 is 45330320412.

21402303354 is a `hidden beast` number, since 2 + 1 + 4 + 0 + 2 + 303 + 354 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 in 15 ways as a sum of consecutive naturals, for example, 722164 + ... + 751215.

It is an arithmetic number, because the mean of its divisors is an integer number (1491797250).

Almost surely, 2^21402303354 is an apocalyptic number.

21402303354 is an abundant number, since it is smaller than the sum of its proper divisors (26335208646).

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

21402303354 is a wasteful number, since it uses less digits than its factorization.

21402303354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473659 (or 1473653 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21402303354 its reverse (45330320412), we get a palindrome (66732623766).

The spelling of 21402303354 in words is "twenty-one billion, four hundred two million, three hundred three thousand, three hundred fifty-four".