20104132740 has 24 divisors (see below), whose sum is σ = 56291571840. Its totient is φ = 5361102048.

The previous prime is 20104132733. The next prime is 20104132751. The reversal of 20104132740 is 4723140102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20104132740.

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, 167534380 + ... + 167534499.

It is an arithmetic number, because the mean of its divisors is an integer number (2345482160).

Almost surely, 2^20104132740 is an apocalyptic number.

20104132740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20104132740 is an abundant number, since it is smaller than the sum of its proper divisors (36187439100).

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

20104132740 is a wasteful number, since it uses less digits than its factorization.

20104132740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335068891 (or 335068889 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

Adding to 20104132740 its reverse (4723140102), we get a palindrome (24827272842).

The spelling of 20104132740 in words is "twenty billion, one hundred four million, one hundred thirty-two thousand, seven hundred forty".