20503155542 has 8 divisors (see below), whose sum is σ = 30763624656. Its totient is φ = 10248613992.

The previous prime is 20503155539. The next prime is 20503155551. The reversal of 20503155542 is 24555130502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20503155499 and 20503155508.

It is a congruent number.

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, 1473233 + ... + 1487084.

It is an arithmetic number, because the mean of its divisors is an integer number (3845453082).

Almost surely, 2^20503155542 is an apocalyptic number.

20503155542 is a deficient number, since it is larger than the sum of its proper divisors (10260469114).

20503155542 is a wasteful number, since it uses less digits than its factorization.

20503155542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963782.

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 20503155542 in words is "twenty billion, five hundred three million, one hundred fifty-five thousand, five hundred forty-two".