20402214144 has 72 divisors (see below), whose sum is σ = 58476567072. Its totient is φ = 6277601280.

The previous prime is 20402214143. The next prime is 20402214167. The reversal of 20402214144 is 44141220402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402214143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011762 + ... + 1031729.

Almost surely, 2^20402214144 is an apocalyptic number.

20402214144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20402214144 is an abundant number, since it is smaller than the sum of its proper divisors (38074352928).

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

20402214144 is a wasteful number, since it uses less digits than its factorization.

20402214144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043523 (or 2043509 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 20402214144 its reverse (44141220402), we get a palindrome (64543434546).

The spelling of 20402214144 in words is "twenty billion, four hundred two million, two hundred fourteen thousand, one hundred forty-four".