20526146 has 4 divisors (see below), whose sum is σ = 30789222. Its totient is φ = 10263072.

The previous prime is 20526071. The next prime is 20526151. The reversal of 20526146 is 64162502.

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., 12880921 + 7645225 = 3589^2 + 2765^2 .

It is a super-2 number, since 2×20526146² = 842645339226632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5131535 + ... + 5131538.

Almost surely, 2^20526146 is an apocalyptic number.

20526146 is a deficient number, since it is larger than the sum of its proper divisors (10263076).

20526146 is a wasteful number, since it uses less digits than its factorization.

20526146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10263075.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20526146 is about 4530.5789916963. The cubic root of 20526146 is about 273.8014883379.

Adding to 20526146 its reverse (64162502), we get a palindrome (84688648).

The spelling of 20526146 in words is "twenty million, five hundred twenty-six thousand, one hundred forty-six".