20620245451 has 8 divisors (see below), whose sum is σ = 22347862544. Its totient is φ = 18912834720.

The previous prime is 20620245449. The next prime is 20620245461. The reversal of 20620245451 is 15454202602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20620245451 - 2¹ = 20620245449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20620245431) 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, 5049465 + ... + 5053546.

It is an arithmetic number, because the mean of its divisors is an integer number (2793482818).

Almost surely, 2^20620245451 is an apocalyptic number.

20620245451 is a deficient number, since it is larger than the sum of its proper divisors (1727617093).

20620245451 is a wasteful number, since it uses less digits than its factorization.

20620245451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10103181.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 20620245451 in words is "twenty billion, six hundred twenty million, two hundred forty-five thousand, four hundred fifty-one".