21737048894 has 32 divisors (see below), whose sum is σ = 37012018176. Its totient is φ = 9487772320.

The previous prime is 21737048891. The next prime is 21737048897. The reversal of 21737048894 is 49884073712.

It is an interprime number because it is at equal distance from previous prime (21737048891) and next prime (21737048897).

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21737048891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143522 + ... + 253125.

It is an arithmetic number, because the mean of its divisors is an integer number (1156625568).

Almost surely, 2^21737048894 is an apocalyptic number.

21737048894 is a deficient number, since it is larger than the sum of its proper divisors (15274969282).

21737048894 is a wasteful number, since it uses less digits than its factorization.

21737048894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396760.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 21737048894 in words is "twenty-one billion, seven hundred thirty-seven million, forty-eight thousand, eight hundred ninety-four".