20720083142 has 32 divisors (see below), whose sum is σ = 34024752000. Its totient is φ = 9385185600.

The previous prime is 20720083099. The next prime is 20720083169. The reversal of 20720083142 is 24138002702.

It is a super-2 number, since 2×20720083142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 12194609 + ... + 12196307.

It is an arithmetic number, because the mean of its divisors is an integer number (1063273500).

Almost surely, 2^20720083142 is an apocalyptic number.

20720083142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20720083142 is a deficient number, since it is larger than the sum of its proper divisors (13304668858).

20720083142 is a wasteful number, since it uses less digits than its factorization.

20720083142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332.

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 20720083142 its reverse (24138002702), we get a palindrome (44858085844).

The spelling of 20720083142 in words is "twenty billion, seven hundred twenty million, eighty-three thousand, one hundred forty-two".