20138534348 has 6 divisors (see below), whose sum is σ = 35242435116. Its totient is φ = 10069267172.

The previous prime is 20138534263. The next prime is 20138534389. The reversal of 20138534348 is 84343583102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2517316790 + ... + 2517316797.

It is an arithmetic number, because the mean of its divisors is an integer number (5873739186).

Almost surely, 2^20138534348 is an apocalyptic number.

It is an amenable number.

20138534348 is a deficient number, since it is larger than the sum of its proper divisors (15103900768).

20138534348 is a wasteful number, since it uses less digits than its factorization.

20138534348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034633591 (or 5034633589 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 20138534348 in words is "twenty billion, one hundred thirty-eight million, five hundred thirty-four thousand, three hundred forty-eight".