20746134240 has 96 divisors (see below), whose sum is σ = 70377291936. Its totient is φ = 5106739200.

The previous prime is 20746134209. The next prime is 20746134301. The reversal of 20746134240 is 4243164702.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 1656111 + ... + 1668590.

It is an arithmetic number, because the mean of its divisors is an integer number (733096791).

Almost surely, 2^20746134240 is an apocalyptic number.

20746134240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20746134240 is an abundant number, since it is smaller than the sum of its proper divisors (49631157696).

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

20746134240 is a wasteful number, since it uses less digits than its factorization.

20746134240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324732 (or 3324724 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

Adding to 20746134240 its reverse (4243164702), we get a palindrome (24989298942).

The spelling of 20746134240 in words is "twenty billion, seven hundred forty-six million, one hundred thirty-four thousand, two hundred forty".