21950099625 has 32 divisors (see below), whose sum is σ = 36589512960. Its totient is φ = 11686032000.

The previous prime is 21950099621. The next prime is 21950099641. The reversal of 21950099625 is 52699005912.

It is a happy number.

It is not a de Polignac number, because 21950099625 - 2² = 21950099621 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21950099621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161940 + ... + 264810.

It is an arithmetic number, because the mean of its divisors is an integer number (1143422280).

Almost surely, 2^21950099625 is an apocalyptic number.

21950099625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21950099625 is a deficient number, since it is larger than the sum of its proper divisors (14639413335).

21950099625 is a wasteful number, since it uses less digits than its factorization.

21950099625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103458 (or 103448 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 48.

The spelling of 21950099625 in words is "twenty-one billion, nine hundred fifty million, ninety-nine thousand, six hundred twenty-five".