21070153636 has 24 divisors (see below), whose sum is σ = 42143564736. Its totient is φ = 9029367840.

The previous prime is 21070153619. The next prime is 21070153649. The reversal of 21070153636 is 63635107012.

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 7 ways as a sum of consecutive naturals, for example, 524415 + ... + 563161.

It is an arithmetic number, because the mean of its divisors is an integer number (1755981864).

Almost surely, 2^21070153636 is an apocalyptic number.

It is an amenable number.

21070153636 is an abundant number, since it is smaller than the sum of its proper divisors (21073411100).

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

21070153636 is a wasteful number, since it uses less digits than its factorization.

21070153636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58179 (or 58177 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The spelling of 21070153636 in words is "twenty-one billion, seventy million, one hundred fifty-three thousand, six hundred thirty-six".