19952101 has 8 divisors (see below), whose sum is σ = 22751064. Its totient is φ = 17333760.

The previous prime is 19952099. The next prime is 19952113. The reversal of 19952101 is 10125991.

It can be written as a sum of positive squares in 4 ways, for example, as 2563201 + 17388900 = 1601^2 + 4170^2 .

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 19952101 - 2¹ = 19952099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19952101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19952171) 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, 44920 + ... + 45361.

It is an arithmetic number, because the mean of its divisors is an integer number (2843883).

Almost surely, 2^19952101 is an apocalyptic number.

It is an amenable number.

19952101 is a deficient number, since it is larger than the sum of its proper divisors (2798963).

19952101 is a wasteful number, since it uses less digits than its factorization.

19952101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90311.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 19952101 is about 4466.7774737500. Note that the first 3 decimals coincide. The cubic root of 19952101 is about 271.2248919542.

It can be divided in two parts, 1995 and 2101, that added together give a 12-th power (4096 = 2¹²).

The spelling of 19952101 in words is "nineteen million, nine hundred fifty-two thousand, one hundred one".