20155329772 has 12 divisors (see below), whose sum is σ = 35273452480. Its totient is φ = 10077200496.

The previous prime is 20155329767. The next prime is 20155329793. The reversal of 20155329772 is 27792355102.

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 3 ways as a sum of consecutive naturals, for example, 7068 + ... + 200899.

Almost surely, 2^20155329772 is an apocalyptic number.

It is an amenable number.

20155329772 is a deficient number, since it is larger than the sum of its proper divisors (15118122708).

20155329772 is a wasteful number, since it uses less digits than its factorization.

20155329772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232200 (or 232198 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 43.

The spelling of 20155329772 in words is "twenty billion, one hundred fifty-five million, three hundred twenty-nine thousand, seven hundred seventy-two".