21533074376 has 64 divisors (see below), whose sum is σ = 47494036800. Its totient is φ = 9046425600.

The previous prime is 21533074351. The next prime is 21533074411. The reversal of 21533074376 is 67347033512.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88505 + ... + 225608.

It is an arithmetic number, because the mean of its divisors is an integer number (742094325).

Almost surely, 2^21533074376 is an apocalyptic number.

It is an amenable number.

21533074376 is an abundant number, since it is smaller than the sum of its proper divisors (25960962424).

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

21533074376 is a wasteful number, since it uses less digits than its factorization.

21533074376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314190 (or 314186 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 41.

The spelling of 21533074376 in words is "twenty-one billion, five hundred thirty-three million, seventy-four thousand, three hundred seventy-six".