21400040001 has 16 divisors (see below), whose sum is σ = 29457909248. Its totient is φ = 13804560000.

The previous prime is 21400039979. The next prime is 21400040003. The reversal of 21400040001 is 10004000412.

It is not a de Polignac number, because 21400040001 - 2⁹ = 21400039489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21400040003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1008501 + ... + 1029501.

It is an arithmetic number, because the mean of its divisors is an integer number (1841119328).

Almost surely, 2^21400040001 is an apocalyptic number.

It is an amenable number.

21400040001 is a deficient number, since it is larger than the sum of its proper divisors (8057869247).

21400040001 is a wasteful number, since it uses less digits than its factorization.

21400040001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31992.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21400040001 its reverse (10004000412), we get a palindrome (31404040413).

The spelling of 21400040001 in words is "twenty-one billion, four hundred million, forty thousand, one".