21970240485 has 32 divisors (see below), whose sum is σ = 36327923712. Its totient is φ = 11326482240.

The previous prime is 21970240441. The next prime is 21970240489. The reversal of 21970240485 is 58404207912.

It is not a de Polignac number, because 21970240485 - 2¹⁰ = 21970239461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21970240489) 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, 385822 + ... + 439088.

It is an arithmetic number, because the mean of its divisors is an integer number (1135247616).

Almost surely, 2^21970240485 is an apocalyptic number.

It is an amenable number.

21970240485 is a deficient number, since it is larger than the sum of its proper divisors (14357683227).

21970240485 is a wasteful number, since it uses less digits than its factorization.

21970240485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54193.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 21970240485 in words is "twenty-one billion, nine hundred seventy million, two hundred forty thousand, four hundred eighty-five".