20212765 has 8 divisors (see below), whose sum is σ = 24284160. Its totient is φ = 16150992.

The previous prime is 20212747. The next prime is 20212771. The reversal of 20212765 is 56721202.

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 20212765 - 2¹¹ = 20210717 is a prime.

It is a congruent number.

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, 3576 + ... + 7294.

It is an arithmetic number, because the mean of its divisors is an integer number (3035520).

Almost surely, 2^20212765 is an apocalyptic number.

It is an amenable number.

20212765 is a deficient number, since it is larger than the sum of its proper divisors (4071395).

20212765 is a wasteful number, since it uses less digits than its factorization.

20212765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4811.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20212765 is about 4495.8608741819. The cubic root of 20212765 is about 272.4009234970.

Adding to 20212765 its reverse (56721202), we get a palindrome (76933967).

The spelling of 20212765 in words is "twenty million, two hundred twelve thousand, seven hundred sixty-five".