20529011 has 4 divisors (see below), whose sum is σ = 20818224. Its totient is φ = 20239800.

The previous prime is 20528999. The next prime is 20529023. The reversal of 20529011 is 11092502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11092502 = 2 ⋅5546251.

It is an interprime number because it is at equal distance from previous prime (20528999) and next prime (20529023).

It is a cyclic number.

It is not a de Polignac number, because 20529011 - 2⁶ = 20528947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20529031) 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, 144500 + ... + 144641.

It is an arithmetic number, because the mean of its divisors is an integer number (5204556).

Almost surely, 2^20529011 is an apocalyptic number.

20529011 is a deficient number, since it is larger than the sum of its proper divisors (289213).

20529011 is an equidigital number, since it uses as much as digits as its factorization.

20529011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289212.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 20529011 is about 4530.8951654171. The cubic root of 20529011 is about 273.8142266404.

The spelling of 20529011 in words is "twenty million, five hundred twenty-nine thousand, eleven".