20045015100421 has 4 divisors (see below), whose sum is σ = 21100015895200. Its totient is φ = 18990014305644.

The previous prime is 20045015100401. The next prime is 20045015100437. The reversal of 20045015100421 is 12400151054002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20045015100421 - 2¹¹ = 20045015098373 is a prime.

It is a super-2 number, since 2×20045015100421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045015100401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527500397361 + ... + 527500397398.

It is an arithmetic number, because the mean of its divisors is an integer number (5275003973800).

Almost surely, 2^{20045015100421} is an apocalyptic number.

It is an amenable number.

20045015100421 is a deficient number, since it is larger than the sum of its proper divisors (1055000794779).

20045015100421 is a wasteful number, since it uses less digits than its factorization.

20045015100421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055000794778.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 20045015100421 its reverse (12400151054002), we get a palindrome (32445166154423).

The spelling of 20045015100421 in words is "twenty trillion, forty-five billion, fifteen million, one hundred thousand, four hundred twenty-one".