21059962350 has 144 divisors (see below), whose sum is σ = 60935461488. Its totient is φ = 4799477760.

The previous prime is 21059962333. The next prime is 21059962409. The reversal of 21059962350 is 5326995012.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2590492 + ... + 2598608.

It is an arithmetic number, because the mean of its divisors is an integer number (423162927).

Almost surely, 2^21059962350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21059962350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30467730744).

21059962350 is an abundant number, since it is smaller than the sum of its proper divisors (39875499138).

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

21059962350 is a wasteful number, since it uses less digits than its factorization.

21059962350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8499 (or 8487 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 42.

The spelling of 21059962350 in words is "twenty-one billion, fifty-nine million, nine hundred sixty-two thousand, three hundred fifty".