21154276336 has 10 divisors (see below), whose sum is σ = 40986410432. Its totient is φ = 10577138160.

The previous prime is 21154276309. The next prime is 21154276387. The reversal of 21154276336 is 63367245112.

It is a happy number.

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, 661071120 + ... + 661071151.

Almost surely, 2^21154276336 is an apocalyptic number.

It is an amenable number.

21154276336 is a deficient number, since it is larger than the sum of its proper divisors (19832134096).

21154276336 is a wasteful number, since it uses less digits than its factorization.

21154276336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322142279 (or 1322142273 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The spelling of 21154276336 in words is "twenty-one billion, one hundred fifty-four million, two hundred seventy-six thousand, three hundred thirty-six".