21084732190 has 32 divisors (see below), whose sum is σ = 38333100960. Its totient is φ = 8349450624.

The previous prime is 21084732169. The next prime is 21084732197. The reversal of 21084732190 is 9123748012.

It is a super-2 number, since 2×21084732190² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21084732197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1390932 + ... + 1406008.

It is an arithmetic number, because the mean of its divisors is an integer number (1197909405).

Almost surely, 2^21084732190 is an apocalyptic number.

21084732190 is a deficient number, since it is larger than the sum of its proper divisors (17248368770).

21084732190 is a wasteful number, since it uses less digits than its factorization.

21084732190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16476.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 21084732190 in words is "twenty-one billion, eighty-four million, seven hundred thirty-two thousand, one hundred ninety".