20502070 has 16 divisors (see below), whose sum is σ = 37901808. Its totient is φ = 7979040.

The previous prime is 20502059. The next prime is 20502071. The reversal of 20502070 is 7020502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27336 + ... + 28075.

It is an arithmetic number, because the mean of its divisors is an integer number (2368863).

Almost surely, 2^20502070 is an apocalyptic number.

20502070 is a deficient number, since it is larger than the sum of its proper divisors (17399738).

20502070 is a wasteful number, since it uses less digits than its factorization.

20502070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55455.

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 20502070 is about 4527.9211565574. The cubic root of 20502070 is about 273.6943952727.

Adding to 20502070 its reverse (7020502), we get a palindrome (27522572).

The spelling of 20502070 in words is "twenty million, five hundred two thousand, seventy".