20508823070 has 16 divisors (see below), whose sum is σ = 36929668608. Its totient is φ = 8200465440.

The previous prime is 20508823037. The next prime is 20508823099. The reversal of 20508823070 is 7032880502.

It is a happy number.

It is a super-2 number, since 2×20508823070² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20508823070.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 354761 + ... + 408500.

It is an arithmetic number, because the mean of its divisors is an integer number (2308104288).

Almost surely, 2^20508823070 is an apocalyptic number.

20508823070 is a deficient number, since it is larger than the sum of its proper divisors (16420845538).

20508823070 is a wasteful number, since it uses less digits than its factorization.

20508823070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765955.

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 20508823070 in words is "twenty billion, five hundred eight million, eight hundred twenty-three thousand, seventy".