21400203404229 has 32 divisors (see below), whose sum is σ = 30765522278400. Its totient is φ = 13153495055040.

The previous prime is 21400203404131. The next prime is 21400203404249. The reversal of 21400203404229 is 92240430200412.

It is not a de Polignac number, because 21400203404229 - 2¹⁶ = 21400203338693 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21400203404229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400203404249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151361232 + ... + 151502550.

It is an arithmetic number, because the mean of its divisors is an integer number (961422571200).

Almost surely, 2^{21400203404229} is an apocalyptic number.

It is an amenable number.

21400203404229 is a deficient number, since it is larger than the sum of its proper divisors (9365318874171).

21400203404229 is a wasteful number, since it uses less digits than its factorization.

21400203404229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145985.

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 21400203404229 in words is "twenty-one trillion, four hundred billion, two hundred three million, four hundred four thousand, two hundred twenty-nine".