21234440034 has 32 divisors (see below), whose sum is σ = 47193209280. Its totient is φ = 7077312000.

The previous prime is 21234440027. The next prime is 21234440039. The reversal of 21234440034 is 43004443212.

It is a happy number.

21234440034 is a `hidden beast` number, since 21 + 234 + 4 + 400 + 3 + 4 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (21234440039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585634 + ... + 620834.

It is an arithmetic number, because the mean of its divisors is an integer number (1474787790).

Almost surely, 2^21234440034 is an apocalyptic number.

21234440034 is an abundant number, since it is smaller than the sum of its proper divisors (25958769246).

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

21234440034 is a wasteful number, since it uses less digits than its factorization.

21234440034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46383 (or 46377 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21234440034 its reverse (43004443212), we get a palindrome (64238883246).

The spelling of 21234440034 in words is "twenty-one billion, two hundred thirty-four million, four hundred forty thousand, thirty-four".