21842175102 has 32 divisors (see below), whose sum is σ = 47670781824. Its totient is φ = 6616740000.

The previous prime is 21842175041. The next prime is 21842175143. The reversal of 21842175102 is 20157124812.

It is a super-2 number, since 2×21842175102² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163668 + ... + 265464.

It is an arithmetic number, because the mean of its divisors is an integer number (1489711932).

Almost surely, 2^21842175102 is an apocalyptic number.

21842175102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21842175102 is an abundant number, since it is smaller than the sum of its proper divisors (25828606722).

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

21842175102 is a wasteful number, since it uses less digits than its factorization.

21842175102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105064.

The product of its (nonzero) digits is 8960, while the sum is 33.

Adding to 21842175102 its reverse (20157124812), we get a palindrome (41999299914).

The spelling of 21842175102 in words is "twenty-one billion, eight hundred forty-two million, one hundred seventy-five thousand, one hundred two".