21422110040 has 32 divisors (see below), whose sum is σ = 51035028480. Its totient is φ = 8064794112.

The previous prime is 21422110037. The next prime is 21422110043. The reversal of 21422110040 is 4001122412.

It is an interprime number because it is at equal distance from previous prime (21422110037) and next prime (21422110043).

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422110043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15750872 + ... + 15752231.

It is an arithmetic number, because the mean of its divisors is an integer number (1594844640).

Almost surely, 2^21422110040 is an apocalyptic number.

21422110040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21422110040 is an abundant number, since it is smaller than the sum of its proper divisors (29612918440).

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

21422110040 is a wasteful number, since it uses less digits than its factorization.

21422110040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31503131 (or 31503127 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21422110040 its reverse (4001122412), we get a palindrome (25423232452).

The spelling of 21422110040 in words is "twenty-one billion, four hundred twenty-two million, one hundred ten thousand, forty".