19620101 has 8 divisors (see below), whose sum is σ = 20483064. Its totient is φ = 18774720.

The previous prime is 19620059. The next prime is 19620113. The reversal of 19620101 is 10102691.

It can be written as a sum of positive squares in 4 ways, for example, as 30625 + 19589476 = 175^2 + 4426^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19620101 - 2²² = 15425797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19620191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2090 + ... + 6603.

It is an arithmetic number, because the mean of its divisors is an integer number (2560383).

Almost surely, 2^19620101 is an apocalyptic number.

It is an amenable number.

19620101 is a deficient number, since it is larger than the sum of its proper divisors (862963).

19620101 is an equidigital number, since it uses as much as digits as its factorization.

19620101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8791.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 19620101 is about 4429.4583190273. The cubic root of 19620101 is about 269.7120890753.

Adding to 19620101 its reverse (10102691), we get a palindrome (29722792).

The spelling of 19620101 in words is "nineteen million, six hundred twenty thousand, one hundred one".