20725212706 has 16 divisors (see below), whose sum is σ = 34214112288. Its totient is φ = 9337182400.

The previous prime is 20725212689. The next prime is 20725212757. The reversal of 20725212706 is 60721252702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4165900 + ... + 4170871.

It is an arithmetic number, because the mean of its divisors is an integer number (2138382018).

Almost surely, 2^20725212706 is an apocalyptic number.

20725212706 is a deficient number, since it is larger than the sum of its proper divisors (13488899582).

20725212706 is a wasteful number, since it uses less digits than its factorization.

20725212706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8336897.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 20725212706 in words is "twenty billion, seven hundred twenty-five million, two hundred twelve thousand, seven hundred six".