20705327400 has 48 divisors (see below), whose sum is σ = 64186516800. Its totient is φ = 5521420480.

The previous prime is 20705327393. The next prime is 20705327413. The reversal of 20705327400 is 472350702.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17253840 + ... + 17255039.

It is an arithmetic number, because the mean of its divisors is an integer number (1337219100).

Almost surely, 2^20705327400 is an apocalyptic number.

20705327400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20705327400 is an abundant number, since it is smaller than the sum of its proper divisors (43481189400).

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

20705327400 is a wasteful number, since it uses less digits than its factorization.

20705327400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34508898 (or 34508889 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The spelling of 20705327400 in words is "twenty billion, seven hundred five million, three hundred twenty-seven thousand, four hundred".