20534322501 has 64 divisors (see below), whose sum is σ = 37980518400. Its totient is φ = 10652342400.

The previous prime is 20534322499. The next prime is 20534322547. The reversal of 20534322501 is 10522343502.

It is a happy number.

20534322501 is a `hidden beast` number, since 205 + 3 + 432 + 25 + 0 + 1 = 666.

It is not a de Polignac number, because 20534322501 - 2¹ = 20534322499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534322551) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1575630 + ... + 1588608.

It is an arithmetic number, because the mean of its divisors is an integer number (593445600).

Almost surely, 2^20534322501 is an apocalyptic number.

20534322501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20534322501 is a deficient number, since it is larger than the sum of its proper divisors (17446195899).

20534322501 is a wasteful number, since it uses less digits than its factorization.

20534322501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13767 (or 13761 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 20534322501 in words is "twenty billion, five hundred thirty-four million, three hundred twenty-two thousand, five hundred one".