33545220420 has 96 divisors (see below), whose sum is σ = 99487761408. Its totient is φ = 8416141312.

The previous prime is 33545220407. The next prime is 33545220427. The reversal of 33545220420 is 2402254533.

It is a super-2 number, since 2×33545220420² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (33545220427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4419949 + ... + 4427531.

It is an arithmetic number, because the mean of its divisors is an integer number (1036330848).

Almost surely, 2^33545220420 is an apocalyptic number.

33545220420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33545220420 is an abundant number, since it is smaller than the sum of its proper divisors (65942540988).

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

33545220420 is a wasteful number, since it uses less digits than its factorization.

33545220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11949 (or 11947 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 30.

Adding to 33545220420 its reverse (2402254533), we get a palindrome (35947474953).

The spelling of 33545220420 in words is "thirty-three billion, five hundred forty-five million, two hundred twenty thousand, four hundred twenty".