20174326840 has 16 divisors (see below), whose sum is σ = 45392235480. Its totient is φ = 8069730720.

The previous prime is 20174326831. The next prime is 20174326841. The reversal of 20174326840 is 4862347102.

It is a self number, because there is not a number n which added to its sum of digits gives 20174326840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20174326841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252179046 + ... + 252179125.

Almost surely, 2^20174326840 is an apocalyptic number.

20174326840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20174326840 is an abundant number, since it is smaller than the sum of its proper divisors (25217908640).

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

20174326840 is a wasteful number, since it uses less digits than its factorization.

20174326840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504358182 (or 504358178 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 20174326840 in words is "twenty billion, one hundred seventy-four million, three hundred twenty-six thousand, eight hundred forty".