20723505504 has 192 divisors, whose sum is σ = 62716550400. Its totient is φ = 5938071552.

The previous prime is 20723505469. The next prime is 20723505511. The reversal of 20723505504 is 40550532702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1391602 + ... + 1406414.

It is an arithmetic number, because the mean of its divisors is an integer number (326648700).

Almost surely, 2^20723505504 is an apocalyptic number.

20723505504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20723505504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31358275200).

20723505504 is an abundant number, since it is smaller than the sum of its proper divisors (41993044896).

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

20723505504 is a wasteful number, since it uses less digits than its factorization.

20723505504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14917 (or 14909 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 33.

The spelling of 20723505504 in words is "twenty billion, seven hundred twenty-three million, five hundred five thousand, five hundred four".