20090980251 has 24 divisors (see below), whose sum is σ = 29549286000. Its totient is φ = 13150413312.

The previous prime is 20090980243. The next prime is 20090980277. The reversal of 20090980251 is 15208909002.

It is not a de Polignac number, because 20090980251 - 2³ = 20090980243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20090980201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 406195 + ... + 452963.

It is an arithmetic number, because the mean of its divisors is an integer number (1231220250).

Almost surely, 2^20090980251 is an apocalyptic number.

20090980251 is a deficient number, since it is larger than the sum of its proper divisors (9458305749).

20090980251 is a wasteful number, since it uses less digits than its factorization.

20090980251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47643 (or 47640 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 20090980251 in words is "twenty billion, ninety million, nine hundred eighty thousand, two hundred fifty-one".