20520670800 has 180 divisors, whose sum is σ = 76466939136. Its totient is φ = 4690425600.

The previous prime is 20520670783. The next prime is 20520670853. The reversal of 20520670800 is 807602502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 115696 + ... + 233295.

Almost surely, 2^20520670800 is an apocalyptic number.

20520670800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20520670800 is an abundant number, since it is smaller than the sum of its proper divisors (55946268336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20520670800 is a wasteful number, since it uses less digits than its factorization.

20520670800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349026 (or 349008 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 20520670800 in words is "twenty billion, five hundred twenty million, six hundred seventy thousand, eight hundred".