21370737297 has 32 divisors (see below), whose sum is σ = 35380332288. Its totient is φ = 11172704256.

The previous prime is 21370737253. The next prime is 21370737299. The reversal of 21370737297 is 79273707312.

It is not a de Polignac number, because 21370737297 - 2⁷ = 21370737169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21370737299) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315528 + ... + 377225.

It is an arithmetic number, because the mean of its divisors is an integer number (1105635384).

Almost surely, 2^21370737297 is an apocalyptic number.

It is an amenable number.

21370737297 is a deficient number, since it is larger than the sum of its proper divisors (14009594991).

21370737297 is a wasteful number, since it uses less digits than its factorization.

21370737297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692889.

The product of its (nonzero) digits is 777924, while the sum is 48.

The spelling of 21370737297 in words is "twenty-one billion, three hundred seventy million, seven hundred thirty-seven thousand, two hundred ninety-seven".