21154016152 has 16 divisors (see below), whose sum is σ = 40586194440. Its totient is φ = 10331030976.

The previous prime is 21154016129. The next prime is 21154016153. The reversal of 21154016152 is 25161045112.

It is a self number, because there is not a number n which added to its sum of digits gives 21154016152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21154016153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30746773 + ... + 30747460.

Almost surely, 2^21154016152 is an apocalyptic number.

It is an amenable number.

21154016152 is a deficient number, since it is larger than the sum of its proper divisors (19432178288).

21154016152 is a wasteful number, since it uses less digits than its factorization.

21154016152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61494282 (or 61494278 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 21154016152 in words is "twenty-one billion, one hundred fifty-four million, sixteen thousand, one hundred fifty-two".