21340141400 has 24 divisors (see below), whose sum is σ = 49615829220. Its totient is φ = 8536056480.

The previous prime is 21340141369. The next prime is 21340141409. The reversal of 21340141400 is 414104312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340141409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53350154 + ... + 53350553.

Almost surely, 2^21340141400 is an apocalyptic number.

21340141400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21340141400 is an abundant number, since it is smaller than the sum of its proper divisors (28275687820).

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

21340141400 is a wasteful number, since it uses less digits than its factorization.

21340141400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106700723 (or 106700714 counting only the distinct ones).

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

Adding to 21340141400 its reverse (414104312), we get a palindrome (21754245712).

The spelling of 21340141400 in words is "twenty-one billion, three hundred forty million, one hundred forty-one thousand, four hundred".