21844607148 has 120 divisors (see below), whose sum is σ = 70284547872. Its totient is φ = 5761207296.

The previous prime is 21844607143. The next prime is 21844607153. The reversal of 21844607148 is 84170644812.

21844607148 is a `hidden beast` number, since 2 + 1 + 84 + 460 + 71 + 48 = 666.

It is an interprime number because it is at equal distance from previous prime (21844607143) and next prime (21844607153).

It is a super-2 number, since 2×21844607148² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21844607143) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 340965 + ... + 399932.

Almost surely, 2^21844607148 is an apocalyptic number.

21844607148 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21844607148 is an abundant number, since it is smaller than the sum of its proper divisors (48439940724).

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

21844607148 is a wasteful number, since it uses less digits than its factorization.

21844607148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740933 (or 740922 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 21844607148 in words is "twenty-one billion, eight hundred forty-four million, six hundred seven thousand, one hundred forty-eight".