21045452350 has 24 divisors (see below), whose sum is σ = 42155661240. Its totient is φ = 7770628320.

The previous prime is 21045452347. The next prime is 21045452377. The reversal of 21045452350 is 5325454012.

It is a super-2 number, since 2×21045452350² (a number of 21 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 11 ways as a sum of consecutive naturals, for example, 16188160 + ... + 16189459.

It is an arithmetic number, because the mean of its divisors is an integer number (1756485885).

Almost surely, 2^21045452350 is an apocalyptic number.

21045452350 is an abundant number, since it is smaller than the sum of its proper divisors (21110208890).

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

21045452350 is a wasteful number, since it uses less digits than its factorization.

21045452350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32377644 (or 32377639 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 21045452350 in words is "twenty-one billion, forty-five million, four hundred fifty-two thousand, three hundred fifty".