420021000545 has 16 divisors (see below), whose sum is σ = 505765054080. Its totient is φ = 334858694784.

The previous prime is 420021000517. The next prime is 420021000587. The reversal of 420021000545 is 545000120024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 420021000545 - 2⁶ = 420021000481 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 420021000545.

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, 1769474 + ... + 1992756.

It is an arithmetic number, because the mean of its divisors is an integer number (31610315880).

Almost surely, 2^420021000545 is an apocalyptic number.

It is an amenable number.

420021000545 is a deficient number, since it is larger than the sum of its proper divisors (85744053535).

420021000545 is a wasteful number, since it uses less digits than its factorization.

420021000545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224584.

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 420021000545 its reverse (545000120024), we get a palindrome (965021120569).

The spelling of 420021000545 in words is "four hundred twenty billion, twenty-one million, five hundred forty-five", and thus it is an aban number.