21301422140 has 24 divisors (see below), whose sum is σ = 44745918000. Its totient is φ = 8518105728.

The previous prime is 21301422137. The next prime is 21301422151. The reversal of 21301422140 is 4122410312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82217 + ... + 222176.

It is an arithmetic number, because the mean of its divisors is an integer number (1864413250).

Almost surely, 2^21301422140 is an apocalyptic number.

21301422140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301422140 is an abundant number, since it is smaller than the sum of its proper divisors (23444495860).

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

21301422140 is a wasteful number, since it uses less digits than its factorization.

21301422140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307901 (or 307899 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21301422140 its reverse (4122410312), we get a palindrome (25423832452).

The spelling of 21301422140 in words is "twenty-one billion, three hundred one million, four hundred twenty-two thousand, one hundred forty".