22691878380 has 48 divisors (see below), whose sum is σ = 70596956640. Its totient is φ = 6051167424.

The previous prime is 22691878367. The next prime is 22691878403. The reversal of 22691878380 is 8387819622.

It is a happy number.

22691878380 is a `hidden beast` number, since 22 + 69 + 187 + 8 + 380 = 666.

It is a super-2 number, since 2×22691878380² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 21010459 + ... + 21011538.

It is an arithmetic number, because the mean of its divisors is an integer number (1470769930).

Almost surely, 2^22691878380 is an apocalyptic number.

22691878380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22691878380 is an abundant number, since it is smaller than the sum of its proper divisors (47905078260).

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

22691878380 is a wasteful number, since it uses less digits than its factorization.

22691878380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42022015 (or 42022007 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 22691878380 in words is "twenty-two billion, six hundred ninety-one million, eight hundred seventy-eight thousand, three hundred eighty".