20278297937 has 16 divisors (see below), whose sum is σ = 21217472640. Its totient is φ = 19355774592.

The previous prime is 20278297873. The next prime is 20278297951. The reversal of 20278297937 is 73979287202.

It is a cyclic number.

It is not a de Polignac number, because 20278297937 - 2⁶ = 20278297873 is a prime.

It is a super-2 number, since 2×20278297937² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20278297997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1837478 + ... + 1848480.

It is an arithmetic number, because the mean of its divisors is an integer number (1326092040).

Almost surely, 2^20278297937 is an apocalyptic number.

It is an amenable number.

20278297937 is a deficient number, since it is larger than the sum of its proper divisors (939174703).

20278297937 is a wasteful number, since it uses less digits than its factorization.

20278297937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11752.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 20278297937 in words is "twenty billion, two hundred seventy-eight million, two hundred ninety-seven thousand, nine hundred thirty-seven".