20734895 has 4 divisors (see below), whose sum is σ = 24881880. Its totient is φ = 16587912.

The previous prime is 20734853. The next prime is 20734919. The reversal of 20734895 is 59843702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20734895 - 2¹² = 20730799 is a prime.

It is a super-2 number, since 2×20734895² = 859871741322050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2073485 + ... + 2073494.

It is an arithmetic number, because the mean of its divisors is an integer number (6220470).

Almost surely, 2^20734895 is an apocalyptic number.

20734895 is a deficient number, since it is larger than the sum of its proper divisors (4146985).

20734895 is an equidigital number, since it uses as much as digits as its factorization.

20734895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4146984.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 20734895 is about 4553.5584985811. The cubic root of 20734895 is about 274.7265380750.

The spelling of 20734895 in words is "twenty million, seven hundred thirty-four thousand, eight hundred ninety-five".