20723134555416 has 32 divisors (see below), whose sum is σ = 51811828833600. Its totient is φ = 6907179192480.

The previous prime is 20723134555411. The next prime is 20723134555447. The reversal of 20723134555416 is 61455543132702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20723134555411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32952390 + ... + 33575381.

It is an arithmetic number, because the mean of its divisors is an integer number (1619119651050).

Almost surely, 2^{20723134555416} is an apocalyptic number.

It is an amenable number.

20723134555416 is an abundant number, since it is smaller than the sum of its proper divisors (31088694278184).

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

20723134555416 is a wasteful number, since it uses less digits than its factorization.

20723134555416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66540759 (or 66540755 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 20723134555416 in words is "twenty trillion, seven hundred twenty-three billion, one hundred thirty-four million, five hundred fifty-five thousand, four hundred sixteen".