20016347538 has 32 divisors (see below), whose sum is σ = 43867901952. Its totient is φ = 6038355600.

The previous prime is 20016347537. The next prime is 20016347551. The reversal of 20016347538 is 83574361002.

It is a super-2 number, since 2×20016347538² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20016347496 and 20016347505.

It is not an unprimeable number, because it can be changed into a prime (20016347537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 665278 + ... + 694713.

It is an arithmetic number, because the mean of its divisors is an integer number (1370871936).

Almost surely, 2^20016347538 is an apocalyptic number.

20016347538 is an abundant number, since it is smaller than the sum of its proper divisors (23851554414).

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

20016347538 is a wasteful number, since it uses less digits than its factorization.

20016347538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360230.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 20016347538 in words is "twenty billion, sixteen million, three hundred forty-seven thousand, five hundred thirty-eight".