20995534 has 8 divisors (see below), whose sum is σ = 35992368. Its totient is φ = 8998080.

The previous prime is 20995517. The next prime is 20995537. The reversal of 20995534 is 43559902.

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

It is a junction number, because it is equal to n+sod(n) for n = 20995493 and 20995502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20995537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749827 + ... + 749854.

It is an arithmetic number, because the mean of its divisors is an integer number (4499046).

Almost surely, 2^20995534 is an apocalyptic number.

20995534 is a deficient number, since it is larger than the sum of its proper divisors (14996834).

20995534 is a wasteful number, since it uses less digits than its factorization.

20995534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499690.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 20995534 is about 4582.0883884971. The cubic root of 20995534 is about 275.8728585446.

The spelling of 20995534 in words is "twenty million, nine hundred ninety-five thousand, five hundred thirty-four".