20627341690 has 16 divisors (see below), whose sum is σ = 37138539528. Its totient is φ = 8248864576.

The previous prime is 20627341667. The next prime is 20627341733. The reversal of 20627341690 is 9614372602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19861546761 + 765794929 = 140931^2 + 27673^2 .

It is a super-2 number, since 2×20627341690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216877 + ... + 297136.

Almost surely, 2^20627341690 is an apocalyptic number.

20627341690 is a deficient number, since it is larger than the sum of its proper divisors (16511197838).

20627341690 is a wasteful number, since it uses less digits than its factorization.

20627341690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518033.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 20627341690 in words is "twenty billion, six hundred twenty-seven million, three hundred forty-one thousand, six hundred ninety".