20221010402 has 4 divisors (see below), whose sum is σ = 30331515606. Its totient is φ = 10110505200.

The previous prime is 20221010401. The next prime is 20221010419. The reversal of 20221010402 is 20401012202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20401012202 = 2 ⋅10200506101.

It can be written as a sum of positive squares in only one way, i.e., 10118549281 + 10102461121 = 100591^2 + 100511^2 .

It is not an unprimeable number, because it can be changed into a prime (20221010401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055252599 + ... + 5055252602.

Almost surely, 2^20221010402 is an apocalyptic number.

20221010402 is a deficient number, since it is larger than the sum of its proper divisors (10110505204).

20221010402 is a wasteful number, since it uses less digits than its factorization.

20221010402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110505203.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20221010402 its reverse (20401012202), we get a palindrome (40622022604).

The spelling of 20221010402 in words is "twenty billion, two hundred twenty-one million, ten thousand, four hundred two".