21142234300 has 36 divisors (see below), whose sum is σ = 50049437256. Its totient is φ = 7688084800.

The previous prime is 21142234283. The next prime is 21142234307. The reversal of 21142234300 is 343224112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142234307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9609007 + ... + 9611206.

It is an arithmetic number, because the mean of its divisors is an integer number (1390262146).

Almost surely, 2^21142234300 is an apocalyptic number.

21142234300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21142234300 is an abundant number, since it is smaller than the sum of its proper divisors (28907202956).

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

21142234300 is a wasteful number, since it uses less digits than its factorization.

21142234300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19220238 (or 19220231 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21142234300 its reverse (343224112), we get a palindrome (21485458412).

The spelling of 21142234300 in words is "twenty-one billion, one hundred forty-two million, two hundred thirty-four thousand, three hundred".