20551343512 has 16 divisors (see below), whose sum is σ = 44038593360. Its totient is φ = 8807718624.

The previous prime is 20551343507. The next prime is 20551343539. The reversal of 20551343512 is 21534315502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183494083 + ... + 183494194.

It is an arithmetic number, because the mean of its divisors is an integer number (2752412085).

Almost surely, 2^20551343512 is an apocalyptic number.

It is an amenable number.

20551343512 is an abundant number, since it is smaller than the sum of its proper divisors (23487249848).

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

20551343512 is a wasteful number, since it uses less digits than its factorization.

20551343512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366988290 (or 366988286 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 20551343512 in words is "twenty billion, five hundred fifty-one million, three hundred forty-three thousand, five hundred twelve".