22051278000 has 720 divisors, whose sum is σ = 85385305824. Its totient is φ = 5499187200.

The previous prime is 22051277977. The next prime is 22051278023. The reversal of 22051278000 is 87215022.

It is an interprime number because it is at equal distance from previous prime (22051277977) and next prime (22051278023).

It is a tau number, because it is divible by the number of its divisors (720).

It is a super-2 number, since 2×22051278000² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 140453922 + ... + 140454078.

Almost surely, 2^22051278000 is an apocalyptic number.

22051278000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22051278000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42692652912).

22051278000 is an abundant number, since it is smaller than the sum of its proper divisors (63334027824).

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

22051278000 is a wasteful number, since it uses less digits than its factorization.

22051278000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The spelling of 22051278000 in words is "twenty-two billion, fifty-one million, two hundred seventy-eight thousand".