21196542350 has 24 divisors (see below), whose sum is σ = 39980865168. Its totient is φ = 8359198400.

The previous prime is 21196542343. The next prime is 21196542371. The reversal of 21196542350 is 5324569112.

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 11 ways as a sum of consecutive naturals, for example, 2981879 + ... + 2988978.

It is an arithmetic number, because the mean of its divisors is an integer number (1665869382).

Almost surely, 2^21196542350 is an apocalyptic number.

21196542350 is a deficient number, since it is larger than the sum of its proper divisors (18784322818).

21196542350 is a wasteful number, since it uses less digits than its factorization.

21196542350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5970940 (or 5970935 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 21196542350 in words is "twenty-one billion, one hundred ninety-six million, five hundred forty-two thousand, three hundred fifty".