921900736512 has 336 divisors, whose sum is σ = 3052346874720. Its totient is φ = 262639190016.

The previous prime is 921900736483. The next prime is 921900736553. The reversal of 921900736512 is 215637009129.

It is a happy number.

921900736512 is a `hidden beast` number, since 92 + 19 + 0 + 0 + 7 + 36 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-2 number, since 2×921900736512² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192501414 + ... + 192506202.

Almost surely, 2^921900736512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921900736512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526173437360).

921900736512 is an abundant number, since it is smaller than the sum of its proper divisors (2130446138208).

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

921900736512 is a wasteful number, since it uses less digits than its factorization.

921900736512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201 (or 5174 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 921900736512 in words is "nine hundred twenty-one billion, nine hundred million, seven hundred thirty-six thousand, five hundred twelve".