20847820190 has 16 divisors (see below), whose sum is σ = 37799991792. Its totient is φ = 8278257984.

The previous prime is 20847820153. The next prime is 20847820193. The reversal of 20847820190 is 9102874802.

It is a super-2 number, since 2×20847820190² (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 (20847820193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7607324 + ... + 7610063.

It is an arithmetic number, because the mean of its divisors is an integer number (2362499487).

Almost surely, 2^20847820190 is an apocalyptic number.

20847820190 is a deficient number, since it is larger than the sum of its proper divisors (16952171602).

20847820190 is a wasteful number, since it uses less digits than its factorization.

20847820190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15217531.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 20847820190 in words is "twenty billion, eight hundred forty-seven million, eight hundred twenty thousand, one hundred ninety".