20010100420 has 24 divisors (see below), whose sum is σ = 44232854400. Its totient is φ = 7582774752.

The previous prime is 20010100403. The next prime is 20010100489. The reversal of 20010100420 is 2400101002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20010100397 and 20010100406.

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, 26328700 + ... + 26329459.

It is an arithmetic number, because the mean of its divisors is an integer number (1843035600).

Almost surely, 2^20010100420 is an apocalyptic number.

20010100420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010100420 is an abundant number, since it is smaller than the sum of its proper divisors (24222753980).

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

20010100420 is a wasteful number, since it uses less digits than its factorization.

20010100420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52658187 (or 52658185 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20010100420 its reverse (2400101002), we get a palindrome (22410201422).

The spelling of 20010100420 in words is "twenty billion, ten million, one hundred thousand, four hundred twenty".