21234200176 has 60 divisors (see below), whose sum is σ = 48464145120. Its totient is φ = 8985150720.

The previous prime is 21234200153. The next prime is 21234200201. The reversal of 21234200176 is 67100243212.

It is a super-2 number, since 2×21234200176² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109485 + ... + 233356.

It is an arithmetic number, because the mean of its divisors is an integer number (807735752).

Almost surely, 2^21234200176 is an apocalyptic number.

It is an amenable number.

21234200176 is an abundant number, since it is smaller than the sum of its proper divisors (27229944944).

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

21234200176 is a wasteful number, since it uses less digits than its factorization.

21234200176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342942 (or 342929 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 21234200176 its reverse (67100243212), we get a palindrome (88334443388).

The spelling of 21234200176 in words is "twenty-one billion, two hundred thirty-four million, two hundred thousand, one hundred seventy-six".