21150245204 has 24 divisors (see below), whose sum is σ = 40392660000. Its totient is φ = 9610195680.

The previous prime is 21150245203. The next prime is 21150245231. The reversal of 21150245204 is 40254205112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150245203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33527 + ... + 208385.

It is an arithmetic number, because the mean of its divisors is an integer number (1683027500).

Almost surely, 2^21150245204 is an apocalyptic number.

It is an amenable number.

21150245204 is a deficient number, since it is larger than the sum of its proper divisors (19242414796).

21150245204 is a wasteful number, since it uses less digits than its factorization.

21150245204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177623 (or 177621 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 21150245204 in words is "twenty-one billion, one hundred fifty million, two hundred forty-five thousand, two hundred four".