20761005 has 8 divisors (see below), whose sum is σ = 33217632. Its totient is φ = 11072528.

The previous prime is 20761003. The next prime is 20761009. The reversal of 20761005 is 50016702.

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 20761005 - 2¹ = 20761003 is a prime.

It is a super-2 number, since 2×20761005² = 862038657220050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20761003) 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, 692019 + ... + 692048.

It is an arithmetic number, because the mean of its divisors is an integer number (4152204).

Almost surely, 2^20761005 is an apocalyptic number.

It is an amenable number.

20761005 is a deficient number, since it is larger than the sum of its proper divisors (12456627).

20761005 is a wasteful number, since it uses less digits than its factorization.

20761005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384075.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20761005 is about 4556.4245851325. The cubic root of 20761005 is about 274.8418043311.

Adding to 20761005 its reverse (50016702), we get a palindrome (70777707).

It can be divided in two parts, 2076 and 1005, that added together give a triangular number (3081 = T₇₈).

The spelling of 20761005 in words is "twenty million, seven hundred sixty-one thousand, five".