20142531520 has 56 divisors (see below), whose sum is σ = 50049830304. Its totient is φ = 7706704896.

The previous prime is 20142531499. The next prime is 20142531551. The reversal of 20142531520 is 2513524102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1361019 + ... + 1375738.

Almost surely, 2^20142531520 is an apocalyptic number.

20142531520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20142531520 is an abundant number, since it is smaller than the sum of its proper divisors (29907298784).

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

20142531520 is a wasteful number, since it uses less digits than its factorization.

20142531520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736797 (or 2736787 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 20142531520 in words is "twenty billion, one hundred forty-two million, five hundred thirty-one thousand, five hundred twenty".