20912845662 has 24 divisors (see below), whose sum is σ = 45949353840. Its totient is φ = 6872765760.

The previous prime is 20912845631. The next prime is 20912845663. The reversal of 20912845662 is 26654821902.

20912845662 is a `hidden beast` number, since 2 + 0 + 9 + 1 + 2 + 84 + 566 + 2 = 666.

It is a super-2 number, since 2×20912845662² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20912845663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8180587 + ... + 8183142.

It is an arithmetic number, because the mean of its divisors is an integer number (1914556410).

Almost surely, 2^20912845662 is an apocalyptic number.

20912845662 is an abundant number, since it is smaller than the sum of its proper divisors (25036508178).

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

20912845662 is a wasteful number, since it uses less digits than its factorization.

20912845662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16363808 (or 16363805 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 20912845662 in words is "twenty billion, nine hundred twelve million, eight hundred forty-five thousand, six hundred sixty-two".