21152153000 has 64 divisors (see below), whose sum is σ = 53995705920. Its totient is φ = 7691688000.

The previous prime is 21152152939. The next prime is 21152153017. The reversal of 21152153000 is 35125112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 950462 + ... + 972461.

It is an arithmetic number, because the mean of its divisors is an integer number (843682905).

Almost surely, 2^21152153000 is an apocalyptic number.

21152153000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152153000 is an abundant number, since it is smaller than the sum of its proper divisors (32843552920).

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

21152153000 is a wasteful number, since it uses less digits than its factorization.

21152153000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922955 (or 1922941 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 21152153000 its reverse (35125112), we get a palindrome (21187278112).

The spelling of 21152153000 in words is "twenty-one billion, one hundred fifty-two million, one hundred fifty-three thousand".