21234200274 has 48 divisors (see below), whose sum is σ = 54891136800. Its totient is φ = 6066913608.

The previous prime is 21234200261. The next prime is 21234200297. The reversal of 21234200274 is 47200243212.

21234200274 is a `hidden beast` number, since 212 + 3 + 420 + 0 + 27 + 4 = 666.

It is a super-2 number, since 2×21234200274² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4009864 + ... + 4015155.

It is an arithmetic number, because the mean of its divisors is an integer number (1143565350).

Almost surely, 2^21234200274 is an apocalyptic number.

21234200274 is an abundant number, since it is smaller than the sum of its proper divisors (33656936526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21234200274 is a wasteful number, since it uses less digits than its factorization.

21234200274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8025044 (or 8025031 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

Adding to 21234200274 its reverse (47200243212), we get a palindrome (68434443486).

The spelling of 21234200274 in words is "twenty-one billion, two hundred thirty-four million, two hundred thousand, two hundred seventy-four".