20529802 has 4 divisors (see below), whose sum is σ = 30794706. Its totient is φ = 10264900.

The previous prime is 20529799. The next prime is 20529851. The reversal of 20529802 is 20892502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20892502 = 2 ⋅10446251.

It can be written as a sum of positive squares in only one way, i.e., 17147881 + 3381921 = 4141^2 + 1839^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5132449 + ... + 5132452.

Almost surely, 2^20529802 is an apocalyptic number.

20529802 is a deficient number, since it is larger than the sum of its proper divisors (10264904).

20529802 is a wasteful number, since it uses less digits than its factorization.

20529802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10264903.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20529802 is about 4530.9824541704. The cubic root of 20529802 is about 273.8177433591.

The spelling of 20529802 in words is "twenty million, five hundred twenty-nine thousand, eight hundred two".