20859145190 has 32 divisors (see below), whose sum is σ = 40835019456. Its totient is φ = 7625577600.

The previous prime is 20859145183. The next prime is 20859145207. The reversal of 20859145190 is 9154195802.

It is a super-2 number, since 2×20859145190² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781202 + ... + 807461.

It is an arithmetic number, because the mean of its divisors is an integer number (1276094358).

Almost surely, 2^20859145190 is an apocalyptic number.

20859145190 is a deficient number, since it is larger than the sum of its proper divisors (19975874266).

20859145190 is a wasteful number, since it uses less digits than its factorization.

20859145190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588784.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 20859145190 in words is "twenty billion, eight hundred fifty-nine million, one hundred forty-five thousand, one hundred ninety".