20152505542 has 16 divisors (see below), whose sum is σ = 32810383872. Its totient is φ = 9227917440.

The previous prime is 20152505537. The next prime is 20152505557. The reversal of 20152505542 is 24550525102.

It is a happy number.

It is a super-2 number, since 2×20152505542² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 3048259 + ... + 3054862.

It is an arithmetic number, because the mean of its divisors is an integer number (2050648992).

Almost surely, 2^20152505542 is an apocalyptic number.

20152505542 is a deficient number, since it is larger than the sum of its proper divisors (12657878330).

20152505542 is a wasteful number, since it uses less digits than its factorization.

20152505542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103263.

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 20152505542 in words is "twenty billion, one hundred fifty-two million, five hundred five thousand, five hundred forty-two".