20315252340 has 72 divisors (see below), whose sum is σ = 61688521440. Its totient is φ = 5411634624.

The previous prime is 20315252329. The next prime is 20315252429. The reversal of 20315252340 is 4325251302.

It is a happy number.

20315252340 is a `hidden beast` number, since 2 + 0 + 315 + 2 + 5 + 2 + 340 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110871 + ... + 230049.

It is an arithmetic number, because the mean of its divisors is an integer number (856785020).

Almost surely, 2^20315252340 is an apocalyptic number.

20315252340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20315252340 is an abundant number, since it is smaller than the sum of its proper divisors (41373269100).

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

20315252340 is a wasteful number, since it uses less digits than its factorization.

20315252340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120141 (or 120136 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 20315252340 in words is "twenty billion, three hundred fifteen million, two hundred fifty-two thousand, three hundred forty".