21012400414 has 8 divisors (see below), whose sum is σ = 31519356408. Its totient is φ = 10505948280.

The previous prime is 21012400337. The next prime is 21012400417. The reversal of 21012400414 is 41400421012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21012400391 and 21012400400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012400417) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5904 + ... + 205084.

It is an arithmetic number, because the mean of its divisors is an integer number (3939919551).

Almost surely, 2^21012400414 is an apocalyptic number.

21012400414 is a deficient number, since it is larger than the sum of its proper divisors (10506955994).

21012400414 is a wasteful number, since it uses less digits than its factorization.

21012400414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251930.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21012400414 its reverse (41400421012), we get a palindrome (62412821426).

The spelling of 21012400414 in words is "twenty-one billion, twelve million, four hundred thousand, four hundred fourteen".