20150015542 has 4 divisors (see below), whose sum is σ = 30225023316. Its totient is φ = 10075007770.

The previous prime is 20150015537. The next prime is 20150015573. The reversal of 20150015542 is 24551005102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5037503884 + ... + 5037503887.

It is an arithmetic number, because the mean of its divisors is an integer number (7556255829).

Almost surely, 2^20150015542 is an apocalyptic number.

20150015542 is a deficient number, since it is larger than the sum of its proper divisors (10075007774).

20150015542 is a wasteful number, since it uses less digits than its factorization.

20150015542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10075007773.

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 20150015542 in words is "twenty billion, one hundred fifty million, fifteen thousand, five hundred forty-two".