20506802 has 4 divisors (see below), whose sum is σ = 30760206. Its totient is φ = 10253400.

The previous prime is 20506793. The next prime is 20506819. The reversal of 20506802 is 20860502.

It is a happy number.

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., 19989841 + 516961 = 4471^2 + 719^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5126699 + ... + 5126702.

Almost surely, 2^20506802 is an apocalyptic number.

20506802 is a deficient number, since it is larger than the sum of its proper divisors (10253404).

20506802 is a wasteful number, since it uses less digits than its factorization.

20506802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10253403.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20506802 is about 4528.4436620102. The cubic root of 20506802 is about 273.7154504190.

The spelling of 20506802 in words is "twenty million, five hundred six thousand, eight hundred two".