21853855037 has 8 divisors (see below), whose sum is σ = 25256462400. Its totient is φ = 18521404704.

The previous prime is 21853855031. The next prime is 21853855039. The reversal of 21853855037 is 73055835812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21853855037 - 2¹⁶ = 21853789501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21853854982 and 21853855000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21853855031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17538587 + ... + 17539832.

It is an arithmetic number, because the mean of its divisors is an integer number (3157057800).

Almost surely, 2^21853855037 is an apocalyptic number.

It is an amenable number.

21853855037 is a deficient number, since it is larger than the sum of its proper divisors (3402607363).

21853855037 is an equidigital number, since it uses as much as digits as its factorization.

21853855037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35078515.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 21853855037 in words is "twenty-one billion, eight hundred fifty-three million, eight hundred fifty-five thousand, thirty-seven".