20692005 has 8 divisors (see below), whose sum is σ = 33107232. Its totient is φ = 11035728.

The previous prime is 20691989. The next prime is 20692013. The reversal of 20692005 is 50029602.

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

It is not a de Polignac number, because 20692005 - 2⁴ = 20691989 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, 689719 + ... + 689748.

It is an arithmetic number, because the mean of its divisors is an integer number (4138404).

Almost surely, 2^20692005 is an apocalyptic number.

It is an amenable number.

20692005 is a deficient number, since it is larger than the sum of its proper divisors (12415227).

20692005 is a wasteful number, since it uses less digits than its factorization.

20692005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379475.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20692005 is about 4548.8465570955. The cubic root of 20692005 is about 274.5369839452.

The spelling of 20692005 in words is "twenty million, six hundred ninety-two thousand, five".