21946290348 has 24 divisors (see below), whose sum is σ = 51783384240. Its totient is φ = 7233233920.

The previous prime is 21946290329. The next prime is 21946290407. The reversal of 21946290348 is 84309264912.

It is a super-2 number, since 2×21946290348² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21946290297 and 21946290306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10273413 + ... + 10275548.

It is an arithmetic number, because the mean of its divisors is an integer number (2157641010).

Almost surely, 2^21946290348 is an apocalyptic number.

It is an amenable number.

21946290348 is an abundant number, since it is smaller than the sum of its proper divisors (29837093892).

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

21946290348 is a wasteful number, since it uses less digits than its factorization.

21946290348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20549057 (or 20549055 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 21946290348 in words is "twenty-one billion, nine hundred forty-six million, two hundred ninety thousand, three hundred forty-eight".