20552135212 has 12 divisors (see below), whose sum is σ = 41104270480. Its totient is φ = 8808057936.

The previous prime is 20552135141. The next prime is 20552135273. The reversal of 20552135212 is 21253125502.

20552135212 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 734004829 = 20552135212 / (2 + 0 + 5 + 5 + 2 + 1 + 3 + 5 + 2 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367002387 + ... + 367002442.

Almost surely, 2^20552135212 is an apocalyptic number.

It is an amenable number.

20552135212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20552135212 is a wasteful number, since it uses less digits than its factorization.

20552135212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734004840 (or 734004838 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 20552135212 in words is "twenty billion, five hundred fifty-two million, one hundred thirty-five thousand, two hundred twelve".