20299721662 has 64 divisors (see below), whose sum is σ = 35739076608. Its totient is φ = 8553600000.

The previous prime is 20299721633. The next prime is 20299721681. The reversal of 20299721662 is 26612799202.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5071662 + ... + 5075662.

It is an arithmetic number, because the mean of its divisors is an integer number (558423072).

Almost surely, 2^20299721662 is an apocalyptic number.

20299721662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20299721662 is a deficient number, since it is larger than the sum of its proper divisors (15439354946).

20299721662 is a wasteful number, since it uses less digits than its factorization.

20299721662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 20299721662 in words is "twenty billion, two hundred ninety-nine million, seven hundred twenty-one thousand, six hundred sixty-two".