420203520642 has 16 divisors (see below), whose sum is σ = 856263778560. Its totient is φ = 137425050672.

The previous prime is 420203520631. The next prime is 420203520661. The reversal of 420203520642 is 246025302024.

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, 660697042 + ... + 660697677.

It is an arithmetic number, because the mean of its divisors is an integer number (53516486160).

Almost surely, 2^420203520642 is an apocalyptic number.

420203520642 is an abundant number, since it is smaller than the sum of its proper divisors (436060257918).

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

420203520642 is a wasteful number, since it uses less digits than its factorization.

420203520642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321394777.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 420203520642 its reverse (246025302024), we get a palindrome (666228822666).

The spelling of 420203520642 in words is "four hundred twenty billion, two hundred three million, five hundred twenty thousand, six hundred forty-two".