21850040034 has 32 divisors (see below), whose sum is σ = 48734849280. Its totient is φ = 7256466000.

The previous prime is 21850040029. The next prime is 21850040039. The reversal of 21850040034 is 43004005812.

It is an interprime number because it is at equal distance from previous prime (21850040029) and next prime (21850040039).

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 (21850040039) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 731917 + ... + 761184.

It is an arithmetic number, because the mean of its divisors is an integer number (1522964040).

Almost surely, 2^21850040034 is an apocalyptic number.

21850040034 is an abundant number, since it is smaller than the sum of its proper divisors (26884809246).

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

21850040034 is a wasteful number, since it uses less digits than its factorization.

21850040034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493383 (or 1493377 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 21850040034 its reverse (43004005812), we get a palindrome (64854045846).

The spelling of 21850040034 in words is "twenty-one billion, eight hundred fifty million, forty thousand, thirty-four".