20451420454101 has 64 divisors (see below), whose sum is σ = 34779402577920. Its totient is φ = 10397334286080.

The previous prime is 20451420454097. The next prime is 20451420454139. The reversal of 20451420454101 is 10145402415402.

It is not a de Polignac number, because 20451420454101 - 2² = 20451420454097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451420454151) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2258586 + ... + 6782628.

It is an arithmetic number, because the mean of its divisors is an integer number (543428165280).

Almost surely, 2^{20451420454101} is an apocalyptic number.

20451420454101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20451420454101 is a deficient number, since it is larger than the sum of its proper divisors (14327982123819).

20451420454101 is a wasteful number, since it uses less digits than its factorization.

20451420454101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4524666.

The product of its (nonzero) digits is 25600, while the sum is 33.

Adding to 20451420454101 its reverse (10145402415402), we get a palindrome (30596822869503).

The spelling of 20451420454101 in words is "twenty trillion, four hundred fifty-one billion, four hundred twenty million, four hundred fifty-four thousand, one hundred one".