21619547848 has 32 divisors (see below), whose sum is σ = 41697351360. Its totient is φ = 10501168320.

The previous prime is 21619547779. The next prime is 21619547867. The reversal of 21619547848 is 84874591612.

It is a super-2 number, since 2×21619547848² (a number of 21 digits) contains 22 as substring.

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, 133533 + ... + 247123.

It is an arithmetic number, because the mean of its divisors is an integer number (1303042230).

Almost surely, 2^21619547848 is an apocalyptic number.

It is an amenable number.

21619547848 is a deficient number, since it is larger than the sum of its proper divisors (20077803512).

21619547848 is a wasteful number, since it uses less digits than its factorization.

21619547848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114277 (or 114273 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 55.

The spelling of 21619547848 in words is "twenty-one billion, six hundred nineteen million, five hundred forty-seven thousand, eight hundred forty-eight".