10212405805 has 24 divisors (see below), whose sum is σ = 14260722840. Its totient is φ = 7000318080.

The previous prime is 10212405799. The next prime is 10212405809. The reversal of 10212405805 is 50850421201.

It can be written as a sum of positive squares in 4 ways, for example, as 1640979081 + 8571426724 = 40509^2 + 92582^2 .

It is not a de Polignac number, because 10212405805 - 2⁵ = 10212405773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212405809) 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, 930691 + ... + 941599.

It is an arithmetic number, because the mean of its divisors is an integer number (594196785).

Almost surely, 2^10212405805 is an apocalyptic number.

It is an amenable number.

10212405805 is a deficient number, since it is larger than the sum of its proper divisors (4048317035).

10212405805 is a wasteful number, since it uses less digits than its factorization.

10212405805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14749 (or 14742 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The spelling of 10212405805 in words is "ten billion, two hundred twelve million, four hundred five thousand, eight hundred five".