20106724451 has 16 divisors (see below), whose sum is σ = 22209707520. Its totient is φ = 18050589120.

The previous prime is 20106724441. The next prime is 20106724487. The reversal of 20106724451 is 15442760102.

It is a cyclic number.

It is not a de Polignac number, because 20106724451 - 2⁶ = 20106724387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20106724411) 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, 382031 + ... + 431463.

It is an arithmetic number, because the mean of its divisors is an integer number (1388106720).

Almost surely, 2^20106724451 is an apocalyptic number.

20106724451 is a deficient number, since it is larger than the sum of its proper divisors (2102983069).

20106724451 is a wasteful number, since it uses less digits than its factorization.

20106724451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49906.

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 20106724451 in words is "twenty billion, one hundred six million, seven hundred twenty-four thousand, four hundred fifty-one".