20674197690 has 32 divisors (see below), whose sum is σ = 49622219136. Its totient is φ = 5512658880.

The previous prime is 20674197689. The next prime is 20674197721. The reversal of 20674197690 is 9679147602.

It is a super-2 number, since 2×20674197690² (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 15 ways as a sum of consecutive naturals, for example, 489139 + ... + 529721.

It is an arithmetic number, because the mean of its divisors is an integer number (1550694348).

Almost surely, 2^20674197690 is an apocalyptic number.

20674197690 is an abundant number, since it is smaller than the sum of its proper divisors (28948021446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20674197690 is a wasteful number, since it uses less digits than its factorization.

20674197690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57574.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The spelling of 20674197690 in words is "twenty billion, six hundred seventy-four million, one hundred ninety-seven thousand, six hundred ninety".