201520545420 has 48 divisors (see below), whose sum is σ = 571400040960. Its totient is φ = 53058572736.

The previous prime is 201520545377. The next prime is 201520545431. The reversal of 201520545420 is 24545025102.

It is a super-2 number, since 2×201520545420² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 21252702 + ... + 21262181.

It is an arithmetic number, because the mean of its divisors is an integer number (11904167520).

Almost surely, 2^201520545420 is an apocalyptic number.

201520545420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201520545420 is an abundant number, since it is smaller than the sum of its proper divisors (369879495540).

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

201520545420 is a wasteful number, since it uses less digits than its factorization.

201520545420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42514974 (or 42514972 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The spelling of 201520545420 in words is "two hundred one billion, five hundred twenty million, five hundred forty-five thousand, four hundred twenty".