20071701949 has 8 divisors (see below), whose sum is σ = 21858553080. Its totient is φ = 18319547136.

The previous prime is 20071701931. The next prime is 20071701971. The reversal of 20071701949 is 94910717002.

It can be written as a sum of positive squares in 4 ways, for example, as 187881849 + 19883820100 = 13707^2 + 141010^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20071701949 - 2¹⁷ = 20071570877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20071701989) 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, 8672872 + ... + 8675185.

It is an arithmetic number, because the mean of its divisors is an integer number (2732319135).

Almost surely, 2^20071701949 is an apocalyptic number.

It is an amenable number.

20071701949 is a deficient number, since it is larger than the sum of its proper divisors (1786851131).

20071701949 is a wasteful number, since it uses less digits than its factorization.

20071701949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17348159.

The product of its (nonzero) digits is 31752, while the sum is 40.

The spelling of 20071701949 in words is "twenty billion, seventy-one million, seven hundred one thousand, nine hundred forty-nine".