21970049023 has 4 divisors (see below), whose sum is σ = 23660052808. Its totient is φ = 20280045240.

The previous prime is 21970049021. The next prime is 21970049089. The reversal of 21970049023 is 32094007912.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21970049023 - 2¹ = 21970049021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21970049021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845001873 + ... + 845001898.

It is an arithmetic number, because the mean of its divisors is an integer number (5915013202).

Almost surely, 2^21970049023 is an apocalyptic number.

21970049023 is a deficient number, since it is larger than the sum of its proper divisors (1690003785).

21970049023 is a wasteful number, since it uses less digits than its factorization.

21970049023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690003784.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 21970049023 in words is "twenty-one billion, nine hundred seventy million, forty-nine thousand, twenty-three".