20702451046 has 8 divisors (see below), whose sum is σ = 32880363480. Its totient is φ = 9742329888.

The previous prime is 20702451037. The next prime is 20702451047. The reversal of 20702451046 is 64015420702.

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

It is a junction number, because it is equal to n+sod(n) for n = 20702450999 and 20702451017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20702451047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304447776 + ... + 304447843.

It is an arithmetic number, because the mean of its divisors is an integer number (4110045435).

Almost surely, 2^20702451046 is an apocalyptic number.

20702451046 is a deficient number, since it is larger than the sum of its proper divisors (12177912434).

20702451046 is a wasteful number, since it uses less digits than its factorization.

20702451046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608895638.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 20702451046 its reverse (64015420702), we get a palindrome (84717871748).

The spelling of 20702451046 in words is "twenty billion, seven hundred two million, four hundred fifty-one thousand, forty-six".