21422863800 has 240 divisors, whose sum is σ = 80129012040. Its totient is φ = 5273268480.

The previous prime is 21422863799. The next prime is 21422863801. The reversal of 21422863800 is 836822412.

21422863800 is a `hidden beast` number, since 2 + 14 + 2 + 2 + 8 + 638 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21422863799) and next prime (21422863801).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422863801) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 159739 + ... + 261461.

Almost surely, 2^21422863800 is an apocalyptic number.

21422863800 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 21422863800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40064506020).

21422863800 is an abundant number, since it is smaller than the sum of its proper divisors (58706148240).

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

21422863800 is a wasteful number, since it uses less digits than its factorization.

21422863800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101764 (or 101746 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 21422863800 in words is "twenty-one billion, four hundred twenty-two million, eight hundred sixty-three thousand, eight hundred".