20308155550 has 24 divisors (see below), whose sum is σ = 37783800432. Its totient is φ = 8120976000.

The previous prime is 20308155499. The next prime is 20308155587. The reversal of 20308155550 is 5555180302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128230 + ... + 238870.

It is an arithmetic number, because the mean of its divisors is an integer number (1574325018).

Almost surely, 2^20308155550 is an apocalyptic number.

20308155550 is a deficient number, since it is larger than the sum of its proper divisors (17475644882).

20308155550 is a wasteful number, since it uses less digits than its factorization.

20308155550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114324 (or 114319 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 34.

The spelling of 20308155550 in words is "twenty billion, three hundred eight million, one hundred fifty-five thousand, five hundred fifty".