20953465730 has 32 divisors (see below), whose sum is σ = 38469788784. Its totient is φ = 8214276096.

The previous prime is 20953465679. The next prime is 20953465751. The reversal of 20953465730 is 3756435902.

It can be written as a sum of positive squares in 8 ways, for example, as 6317547289 + 14635918441 = 79483^2 + 120979^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475514 + ... + 517706.

Almost surely, 2^20953465730 is an apocalyptic number.

20953465730 is a deficient number, since it is larger than the sum of its proper divisors (17516323054).

20953465730 is a wasteful number, since it uses less digits than its factorization.

20953465730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43190.

The product of its (nonzero) digits is 680400, while the sum is 44.

The spelling of 20953465730 in words is "twenty billion, nine hundred fifty-three million, four hundred sixty-five thousand, seven hundred thirty".