20340021400 has 48 divisors (see below), whose sum is σ = 47311425000. Its totient is φ = 8132417280.

The previous prime is 20340021397. The next prime is 20340021407. The reversal of 20340021400 is 412004302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340021407) 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, 457351 + ... + 499849.

Almost surely, 2^20340021400 is an apocalyptic number.

20340021400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20340021400 is an abundant number, since it is smaller than the sum of its proper divisors (26971403600).

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

20340021400 is a wasteful number, since it uses less digits than its factorization.

20340021400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44908 (or 44899 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20340021400 its reverse (412004302), we get a palindrome (20752025702).

The spelling of 20340021400 in words is "twenty billion, three hundred forty million, twenty-one thousand, four hundred".