21400214044 has 48 divisors (see below), whose sum is σ = 41055559776. Its totient is φ = 9679737600.

The previous prime is 21400213997. The next prime is 21400214089. The reversal of 21400214044 is 44041200412.

It is a super-2 number, since 2×21400214044² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9140314 + ... + 9142654.

It is an arithmetic number, because the mean of its divisors is an integer number (855324162).

Almost surely, 2^21400214044 is an apocalyptic number.

It is an amenable number.

21400214044 is a deficient number, since it is larger than the sum of its proper divisors (19655345732).

21400214044 is a wasteful number, since it uses less digits than its factorization.

21400214044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286 (or 3284 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21400214044 its reverse (44041200412), we get a palindrome (65441414456).

The spelling of 21400214044 in words is "twenty-one billion, four hundred million, two hundred fourteen thousand, forty-four".