20451101 has 8 divisors (see below), whose sum is σ = 22829664. Its totient is φ = 18159120.

The previous prime is 20451097. The next prime is 20451113. The reversal of 20451101 is 10115402.

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 20451101 - 2² = 20451097 is a prime.

It is a super-2 number, since 2×20451101² = 836495064224402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451131) 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, 21146 + ... + 22091.

It is an arithmetic number, because the mean of its divisors is an integer number (2853708).

Almost surely, 2^20451101 is an apocalyptic number.

It is an amenable number.

20451101 is a deficient number, since it is larger than the sum of its proper divisors (2378563).

20451101 is a wasteful number, since it uses less digits than its factorization.

20451101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43291.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 20451101 is about 4522.2893538561. The cubic root of 20451101 is about 273.4674018412.

Adding to 20451101 its reverse (10115402), we get a palindrome (30566503).

The spelling of 20451101 in words is "twenty million, four hundred fifty-one thousand, one hundred one".