21772070474 has 128 divisors (see below), whose sum is σ = 45192314880. Its totient is φ = 7609982400.

The previous prime is 21772070473. The next prime is 21772070483. The reversal of 21772070474 is 47407027712.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21772070473) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4260629 + ... + 4265735.

It is an arithmetic number, because the mean of its divisors is an integer number (353064960).

Almost surely, 2^21772070474 is an apocalyptic number.

21772070474 is an abundant number, since it is smaller than the sum of its proper divisors (23420244406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21772070474 is a wasteful number, since it uses less digits than its factorization.

21772070474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5224.

The product of its (nonzero) digits is 153664, while the sum is 41.

The spelling of 21772070474 in words is "twenty-one billion, seven hundred seventy-two million, seventy thousand, four hundred seventy-four".