20690623800 has 1344 divisors, whose sum is σ = 95631379200. Its totient is φ = 4031078400.

The previous prime is 20690623799. The next prime is 20690623847. The reversal of 20690623800 is 832609602.

20690623800 is a `hidden beast` number, since 20 + 6 + 9 + 0 + 623 + 8 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 213305352 + ... + 213305448.

It is an arithmetic number, because the mean of its divisors is an integer number (71154300).

Almost surely, 2^20690623800 is an apocalyptic number.

20690623800 is a gapful number since it is divisible by the number (20) 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 20690623800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47815689600).

20690623800 is an abundant number, since it is smaller than the sum of its proper divisors (74940755400).

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

20690623800 is a wasteful number, since it uses less digits than its factorization.

20690623800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 20690623800 in words is "twenty billion, six hundred ninety million, six hundred twenty-three thousand, eight hundred".