20145652520 has 32 divisors (see below), whose sum is σ = 51803107200. Its totient is φ = 6907080768.

The previous prime is 20145652411. The next prime is 20145652523. The reversal of 20145652520 is 2525654102.

It is not an unprimeable number, because it can be changed into a prime (20145652523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35974100 + ... + 35974659.

It is an arithmetic number, because the mean of its divisors is an integer number (1618847100).

Almost surely, 2^20145652520 is an apocalyptic number.

20145652520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20145652520 is an abundant number, since it is smaller than the sum of its proper divisors (31657454680).

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

20145652520 is a wasteful number, since it uses less digits than its factorization.

20145652520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71948777 (or 71948773 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 20145652520 in words is "twenty billion, one hundred forty-five million, six hundred fifty-two thousand, five hundred twenty".