20459087870 has 32 divisors (see below), whose sum is σ = 39744196128. Its totient is φ = 7537926528.

The previous prime is 20459087867. The next prime is 20459087879. The reversal of 20459087870 is 7878095402.

It is a super-2 number, since 2×20459087870² (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 (20459087879) 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, 107789 + ... + 229208.

It is an arithmetic number, because the mean of its divisors is an integer number (1242006129).

Almost surely, 2^20459087870 is an apocalyptic number.

20459087870 is a deficient number, since it is larger than the sum of its proper divisors (19285108258).

20459087870 is a wasteful number, since it uses less digits than its factorization.

20459087870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337484.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 20459087870 in words is "twenty billion, four hundred fifty-nine million, eighty-seven thousand, eight hundred seventy".