20423467 has 4 divisors (see below), whose sum is σ = 20434320. Its totient is φ = 20412616.

The previous prime is 20423449. The next prime is 20423479. The reversal of 20423467 is 76432402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20423467 - 2¹¹ = 20421419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20423407) 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, 1792 + ... + 6637.

It is an arithmetic number, because the mean of its divisors is an integer number (5108580).

Almost surely, 2^20423467 is an apocalyptic number.

20423467 is a deficient number, since it is larger than the sum of its proper divisors (10853).

20423467 is an equidigital number, since it uses as much as digits as its factorization.

20423467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10852.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 20423467 is about 4519.2330101467. The cubic root of 20423467 is about 273.3441744989.

Adding to 20423467 its reverse (76432402), we get a palindrome (96855869).

The spelling of 20423467 in words is "twenty million, four hundred twenty-three thousand, four hundred sixty-seven".