20151543012 has 48 divisors (see below), whose sum is σ = 49101437952. Its totient is φ = 6420309280.

The previous prime is 20151542987. The next prime is 20151543023. The reversal of 20151543012 is 21034515102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350587 + ... + 403997.

It is an arithmetic number, because the mean of its divisors is an integer number (1022946624).

Almost surely, 2^20151543012 is an apocalyptic number.

It is an amenable number.

20151543012 is an abundant number, since it is smaller than the sum of its proper divisors (28949894940).

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

20151543012 is a wasteful number, since it uses less digits than its factorization.

20151543012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54808 (or 54806 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 20151543012 in words is "twenty billion, one hundred fifty-one million, five hundred forty-three thousand, twelve".