21939348033 has 24 divisors (see below), whose sum is σ = 32426873856. Its totient is φ = 14287416000.

The previous prime is 21939348017. The next prime is 21939348059. The reversal of 21939348033 is 33084393912.

21939348033 is a `hidden beast` number, since 219 + 393 + 48 + 0 + 3 + 3 = 666.

It is not a de Polignac number, because 21939348033 - 2⁴ = 21939348017 is a prime.

It is a super-2 number, since 2×21939348033² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21939348033.

It is not an unprimeable number, because it can be changed into a prime (21939348073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170608 + ... + 270158.

It is an arithmetic number, because the mean of its divisors is an integer number (1351119744).

Almost surely, 2^21939348033 is an apocalyptic number.

It is an amenable number.

21939348033 is a deficient number, since it is larger than the sum of its proper divisors (10487525823).

21939348033 is a wasteful number, since it uses less digits than its factorization.

21939348033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100125 (or 100122 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 21939348033 in words is "twenty-one billion, nine hundred thirty-nine million, three hundred forty-eight thousand, thirty-three".