21086482790 has 32 divisors (see below), whose sum is σ = 38827002240. Its totient is φ = 8241554304.

The previous prime is 21086482787. The next prime is 21086482799. The reversal of 21086482790 is 9728468012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21086482799) 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 15 ways as a sum of consecutive naturals, for example, 251516 + ... + 324704.

It is an arithmetic number, because the mean of its divisors is an integer number (1213343820).

Almost surely, 2^21086482790 is an apocalyptic number.

21086482790 is a deficient number, since it is larger than the sum of its proper divisors (17740519450).

21086482790 is a wasteful number, since it uses less digits than its factorization.

21086482790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73856.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 21086482790 in words is "twenty-one billion, eighty-six million, four hundred eighty-two thousand, seven hundred ninety".