20949632798570 has 64 divisors (see below), whose sum is σ = 43592930873856. Its totient is φ = 7100224439040.

The previous prime is 20949632798569. The next prime is 20949632798573. The reversal of 20949632798570 is 7589723694902.

It is a super-2 number, since 2×20949632798570² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20949632798494 and 20949632798503.

It is not an unprimeable number, because it can be changed into a prime (20949632798573) 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, 1407680 + ... + 6624260.

It is an arithmetic number, because the mean of its divisors is an integer number (681139544904).

Almost surely, 2^{20949632798570} is an apocalyptic number.

20949632798570 is an abundant number, since it is smaller than the sum of its proper divisors (22643298075286).

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

20949632798570 is a wasteful number, since it uses less digits than its factorization.

20949632798570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217255.

The product of its (nonzero) digits is 411505920, while the sum is 71.

The spelling of 20949632798570 in words is "twenty trillion, nine hundred forty-nine billion, six hundred thirty-two million, seven hundred ninety-eight thousand, five hundred seventy".