21442020300 has 90 divisors (see below), whose sum is σ = 69506585148. Its totient is φ = 5717869920.

The previous prime is 21442020293. The next prime is 21442020329. The reversal of 21442020300 is 302024412.

21442020300 is a `hidden beast` number, since 21 + 442 + 0 + 203 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (90).

It is a super-2 number, since 2×21442020300² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1315482 + ... + 1331681.

Almost surely, 2^21442020300 is an apocalyptic number.

21442020300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21442020300 is an abundant number, since it is smaller than the sum of its proper divisors (48064564848).

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

21442020300 is a wasteful number, since it uses less digits than its factorization.

21442020300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647189 (or 2647173 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21442020300 its reverse (302024412), we get a palindrome (21744044712).

The spelling of 21442020300 in words is "twenty-one billion, four hundred forty-two million, twenty thousand, three hundred".