21400213403 has 8 divisors (see below), whose sum is σ = 22406878368. Its totient is φ = 20399900224.

The previous prime is 21400213391. The next prime is 21400213409. The reversal of 21400213403 is 30431200412.

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

It is a cyclic number.

It is not a de Polignac number, because 21400213403 - 2⁸ = 21400213147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21400213409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581050 + ... + 1594527.

It is an arithmetic number, because the mean of its divisors is an integer number (2800859796).

Almost surely, 2^21400213403 is an apocalyptic number.

21400213403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21400213403 is a deficient number, since it is larger than the sum of its proper divisors (1006664965).

21400213403 is a wasteful number, since it uses less digits than its factorization.

21400213403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175893.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21400213403 its reverse (30431200412), we get a palindrome (51831413815).

The spelling of 21400213403 in words is "twenty-one billion, four hundred million, two hundred thirteen thousand, four hundred three".