20526434 has 4 divisors (see below), whose sum is σ = 30789654. Its totient is φ = 10263216.

The previous prime is 20526431. The next prime is 20526449. The reversal of 20526434 is 43462502.

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

It can be written as a sum of positive squares in only one way, i.e., 19829209 + 697225 = 4453^2 + 835^2 .

It is not an unprimeable number, because it can be changed into a prime (20526431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5131607 + ... + 5131610.

Almost surely, 2^20526434 is an apocalyptic number.

20526434 is a deficient number, since it is larger than the sum of its proper divisors (10263220).

20526434 is a wasteful number, since it uses less digits than its factorization.

20526434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10263219.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 20526434 is about 4530.6107756019. The cubic root of 20526434 is about 273.8027688910.

Adding to 20526434 its reverse (43462502), we get a palindrome (63988936).

The spelling of 20526434 in words is "twenty million, five hundred twenty-six thousand, four hundred thirty-four".