20112205451 has 16 divisors (see below), whose sum is σ = 23534730240. Its totient is φ = 17020640160.

The previous prime is 20112205439. The next prime is 20112205469. The reversal of 20112205451 is 15450221102.

It is a cyclic number.

It is not a de Polignac number, because 20112205451 - 2¹⁴ = 20112189067 is a prime.

It is a super-2 number, since 2×20112205451² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112205411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1305665 + ... + 1320978.

It is an arithmetic number, because the mean of its divisors is an integer number (1470920640).

Almost surely, 2^20112205451 is an apocalyptic number.

20112205451 is a deficient number, since it is larger than the sum of its proper divisors (3422524789).

20112205451 is a wasteful number, since it uses less digits than its factorization.

20112205451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626706.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 20112205451 its reverse (15450221102), we get a palindrome (35562426553).

The spelling of 20112205451 in words is "twenty billion, one hundred twelve million, two hundred five thousand, four hundred fifty-one".