21150401848 has 8 divisors (see below), whose sum is σ = 39657003480. Its totient is φ = 10575200920.

The previous prime is 21150401843. The next prime is 21150401851. The reversal of 21150401848 is 84810405112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150401843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321900108 + ... + 1321900123.

It is an arithmetic number, because the mean of its divisors is an integer number (4957125435).

Almost surely, 2^21150401848 is an apocalyptic number.

It is an amenable number.

21150401848 is a deficient number, since it is larger than the sum of its proper divisors (18506601632).

21150401848 is a wasteful number, since it uses less digits than its factorization.

21150401848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643800237 (or 2643800233 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 34.

The spelling of 21150401848 in words is "twenty-one billion, one hundred fifty million, four hundred one thousand, eight hundred forty-eight".