20533465 has 8 divisors (see below), whose sum is σ = 24758208. Its totient is φ = 16348080.

The previous prime is 20533459. The next prime is 20533477. The reversal of 20533465 is 56433502.

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

It is not a de Polignac number, because 20533465 - 2¹¹ = 20531417 is a prime.

It is a Duffinian 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, 8677 + ... + 10786.

It is an arithmetic number, because the mean of its divisors is an integer number (3094776).

Almost surely, 2^20533465 is an apocalyptic number.

It is an amenable number.

20533465 is a deficient number, since it is larger than the sum of its proper divisors (4224743).

20533465 is a wasteful number, since it uses less digits than its factorization.

20533465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19679.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 20533465 is about 4531.3866531118. The cubic root of 20533465 is about 273.8340275679.

Adding to 20533465 its reverse (56433502), we get a palindrome (76966967).

It can be divided in two parts, 2053346 and 5, that added together give a triangular number (2053351 = T₂₀₂₆).

The spelling of 20533465 in words is "twenty million, five hundred thirty-three thousand, four hundred sixty-five".