20725204472742 has 64 divisors (see below), whose sum is σ = 53460446860800. Its totient is φ = 5197543438080.

The previous prime is 20725204472729. The next prime is 20725204472759. The reversal of 20725204472742 is 24727440252702.

It is a junction number, because it is equal to n+sod(n) for n = 20725204472691 and 20725204472700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773430567 + ... + 773457362.

It is an arithmetic number, because the mean of its divisors is an integer number (835319482200).

Almost surely, 2^{20725204472742} is an apocalyptic number.

20725204472742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20725204472742 is an abundant number, since it is smaller than the sum of its proper divisors (32735242388058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20725204472742 is a wasteful number, since it uses less digits than its factorization.

20725204472742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546887981.

The product of its (nonzero) digits is 3512320, while the sum is 48.

The spelling of 20725204472742 in words is "twenty trillion, seven hundred twenty-five billion, two hundred four million, four hundred seventy-two thousand, seven hundred forty-two".