21093732450 has 240 divisors, whose sum is σ = 67483430784. Its totient is φ = 4785350400.

The previous prime is 21093732427. The next prime is 21093732463. The reversal of 21093732450 is 5423739012.

21093732450 is a `hidden beast` number, since 210 + 9 + 373 + 24 + 50 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 3881235 + ... + 3886665.

Almost surely, 2^21093732450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21093732450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33741715392).

21093732450 is an abundant number, since it is smaller than the sum of its proper divisors (46389698334).

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

21093732450 is a wasteful number, since it uses less digits than its factorization.

21093732450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599 (or 5585 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 21093732450 in words is "twenty-one billion, ninety-three million, seven hundred thirty-two thousand, four hundred fifty".