20213145132 has 12 divisors (see below), whose sum is σ = 47164005336. Its totient is φ = 6737715040.

The previous prime is 20213145107. The next prime is 20213145137. The reversal of 20213145132 is 23154131202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20213145132² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20213145137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842214369 + ... + 842214392.

It is an arithmetic number, because the mean of its divisors is an integer number (3930333778).

Almost surely, 2^20213145132 is an apocalyptic number.

It is an amenable number.

20213145132 is an abundant number, since it is smaller than the sum of its proper divisors (26950860204).

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

20213145132 is a wasteful number, since it uses less digits than its factorization.

20213145132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684428768 (or 1684428766 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 20213145132 its reverse (23154131202), we get a palindrome (43367276334).

The spelling of 20213145132 in words is "twenty billion, two hundred thirteen million, one hundred forty-five thousand, one hundred thirty-two".