20675420073 has 64 divisors (see below), whose sum is σ = 38330327040. Its totient is φ = 10700553600.

The previous prime is 20675420063. The next prime is 20675420081. The reversal of 20675420073 is 37002457602.

It is a happy number.

It is not a de Polignac number, because 20675420073 - 2¹³ = 20675411881 is a prime.

It is a super-2 number, since 2×20675420073² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20675420063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 545061 + ... + 581757.

It is an arithmetic number, because the mean of its divisors is an integer number (598911360).

Almost surely, 2^20675420073 is an apocalyptic number.

It is an amenable number.

20675420073 is a deficient number, since it is larger than the sum of its proper divisors (17654906967).

20675420073 is a wasteful number, since it uses less digits than its factorization.

20675420073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36995 (or 36989 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

Adding to 20675420073 its reverse (37002457602), we get a palindrome (57677877675).

The spelling of 20675420073 in words is "twenty billion, six hundred seventy-five million, four hundred twenty thousand, seventy-three".